100155400 has 24 divisors (see below), whose sum is σ = 232861770. Its totient is φ = 40062080.

The previous prime is 100155383. The next prime is 100155437. The reversal of 100155400 is 4551001.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 53670276 + 46485124 = 7326^2 + 6818^2 .

It is a super-2 number, since 2×100155400² = 20062208298320000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 250189 + ... + 250588.

Almost surely, 2^100155400 is an apocalyptic number.

100155400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100155400 is an abundant number, since it is smaller than the sum of its proper divisors (132706370).

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

100155400 is a wasteful number, since it uses less digits than its factorization.

100155400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500793 (or 500784 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 100155400 is about 10007.7669836982. The cubic root of 100155400 is about 464.3991932253.

The spelling of 100155400 in words is "one hundred million, one hundred fifty-five thousand, four hundred".