722557872 has 60 divisors (see below), whose sum is σ = 2024639760. Its totient is φ = 240557184.

The previous prime is 722557861. The next prime is 722557873. The reversal of 722557872 is 278755227.

722557872 is a `hidden beast` number, since 7 + 2 + 2 + 5 + 578 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (722557873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136654 + ... + 141842.

It is an arithmetic number, because the mean of its divisors is an integer number (33743996).

Almost surely, 2^722557872 is an apocalyptic number.

722557872 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

722557872 is an abundant number, since it is smaller than the sum of its proper divisors (1302081888).

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

722557872 is a wasteful number, since it uses less digits than its factorization.

722557872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6170 (or 6161 counting only the distinct ones).

The product of its digits is 548800, while the sum is 45.

The square root of 722557872 is about 26880.4366035970. The cubic root of 722557872 is about 897.3410708051.

The spelling of 722557872 in words is "seven hundred twenty-two million, five hundred fifty-seven thousand, eight hundred seventy-two".