100555400 has 48 divisors (see below), whose sum is σ = 255050640. Its totient is φ = 36564800.

The previous prime is 100555393. The next prime is 100555421. The reversal of 100555400 is 4555001.

It is a super-2 number, since 2×100555400² = 20222776938320000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20654 + ... + 25053.

It is an arithmetic number, because the mean of its divisors is an integer number (5313555).

Almost surely, 2^100555400 is an apocalyptic number.

100555400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100555400 is an abundant number, since it is smaller than the sum of its proper divisors (154495240).

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

100555400 is a wasteful number, since it uses less digits than its factorization.

100555400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45734 (or 45725 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 100555400 is about 10027.7315480621. The cubic root of 100555400 is about 465.0166101902.

The spelling of 100555400 in words is "one hundred million, five hundred fifty-five thousand, four hundred".