100812800 has 144 divisors (see below), whose sum is σ = 274201200. Its totient is φ = 36454400.

The previous prime is 100812799. The next prime is 100812821. The reversal of 100812800 is 8218001.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 563111 + ... + 563289.

It is an arithmetic number, because the mean of its divisors is an integer number (1904175).

Almost surely, 2^100812800 is an apocalyptic number.

100812800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 100812800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137100600).

100812800 is an abundant number, since it is smaller than the sum of its proper divisors (173388400).

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

100812800 is a wasteful number, since it uses less digits than its factorization.

100812800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 100812800 is about 10040.5577534318. The cubic root of 100812800 is about 465.4130526459.

The spelling of 100812800 in words is "one hundred million, eight hundred twelve thousand, eight hundred".