721875804 has 24 divisors (see below), whose sum is σ = 1813944720. Its totient is φ = 222115584.

The previous prime is 721875799. The next prime is 721875841. The reversal of 721875804 is 408578127.

It is a super-2 number, since 2×721875804² = 1042209352801292832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2313549 + ... + 2313860.

It is an arithmetic number, because the mean of its divisors is an integer number (75581030).

Almost surely, 2^721875804 is an apocalyptic number.

It is an amenable number.

721875804 is an abundant number, since it is smaller than the sum of its proper divisors (1092068916).

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

721875804 is a wasteful number, since it uses less digits than its factorization.

721875804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4627429 (or 4627427 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 42.

The square root of 721875804 is about 26867.7465374378. The cubic root of 721875804 is about 897.0586296158.

The spelling of 721875804 in words is "seven hundred twenty-one million, eight hundred seventy-five thousand, eight hundred four".