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100000000 = 2858
BaseRepresentation
bin1011111010111…
…10000100000000
320222011112012201
411331132010000
5201100000000
613531202544
72322662122
oct575360400
9228145181
10100000000
11514a1531
12295a6454
13179437c9
14d3d1212
158ba496a
hex5f5e100

100000000 has 81 divisors (see below), whose sum is σ = 249511591. Its totient is φ = 40000000.

The previous prime is 99999989. The next prime is 100000007. The reversal of 100000000 is 1.

It is a happy number.

The square root of 100000000 is 10000.

It is a perfect power (a square, a biquadrate, a 8-th power), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 71098624 + 28901376 = 8432^2 + 5376^2 .

It is a Harshad number since it is a multiple of its sum of digits (1).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (100000007) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 19999998 + ... + 20000002.

Almost surely, 2100000000 is an apocalyptic number.

100000000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100000000 is the 10000-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100000000

100000000 is an abundant number, since it is smaller than the sum of its proper divisors (149511591).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100000000 is an frugal number, since it uses more digits than its factorization.

100000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56 (or 7 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 1.

The cubic root of 100000000 is about 464.1588833613.

The spelling of 100000000 in words is "one hundred million", and thus it is an aban number.

Divisors: 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 625 640 800 1000 1250 1280 1600 2000 2500 3125 3200 4000 5000 6250 6400 8000 10000 12500 15625 16000 20000 25000 31250 32000 40000 50000 62500 78125 80000 100000 125000 156250 160000 200000 250000 312500 390625 400000 500000 625000 781250 800000 1000000 1250000 1562500 2000000 2500000 3125000 4000000 5000000 6250000 10000000 12500000 20000000 25000000 50000000 100000000