63904320 has 84 divisors (see below), whose sum is σ = 219814140. Its totient is φ = 17040384.

The previous prime is 63904319. The next prime is 63904333. The reversal of 63904320 is 2340936.

63904320 is a `hidden beast` number, since 639 + 0 + 4 + 3 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32901696 + 31002624 = 5736^2 + 5568^2 .

It is a super-2 number, since 2×63904320² = 8167524229324800, which contains 22 as substring.

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, 8215 + ... + 13974.

It is an arithmetic number, because the mean of its divisors is an integer number (2616835).

Almost surely, 2^63904320 is an apocalyptic number.

63904320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63904320 is an abundant number, since it is smaller than the sum of its proper divisors (155909820).

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

63904320 is a wasteful number, since it uses less digits than its factorization.

63904320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22212 (or 22199 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 63904320 is about 7994.0177633028. The cubic root of 63904320 is about 399.8005672496.

The spelling of 63904320 in words is "sixty-three million, nine hundred four thousand, three hundred twenty".