8100

Properties by base:

More about this number at Positiv Integers and Number Empire.

The number is not a prime.

Its 8 (3 unique) factors are:
2² = 4
3⁴ = 81
5² = 25

Its 45 divisors are:
1
2
3
4
5
6
9
10
12
15
18
20
25
27
30
36
45
50
54
60
75
81
90
100
108
135
150
162
180
225
270
300
324
405
450
540
675
810
900
1350
1620
2025
2700
4050
8100
Its aliquote sum is:
18157
makeing it a abundant number.

As Unicode codepoint (since version 1.1) this number represents this character:ᾤ GREEK SMALL LETTER OMEGA WITH PSILI AND OXIA AND YPOGEGRAMMENI in Greek_Ext (Source: https://ucdapi.org/unicode/latest/codepoint/dec/8100); HTML: ᾤ

The number appears at position 2879 of the decimal digits of π surrounded by
35064302184531910484810053706146806749192781 Source: The Pi-Search Page

Computations done with Math::BigInt 1.999811 and Math::Pari 2.030523 based on PARI/GP 2.11.3 (elapsed: 828.657ms; cpu: 68.585ms)