63904028 has 12 divisors (see below), whose sum is σ = 116694480. Its totient is φ = 30562752.

The previous prime is 63904019. The next prime is 63904033. The reversal of 63904028 is 82040936.

It is a junction number, because it is equal to n+sod(n) for n = 63903985 and 63904003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 347213 + ... + 347396.

It is an arithmetic number, because the mean of its divisors is an integer number (9724540).

Almost surely, 2^63904028 is an apocalyptic number.

It is an amenable number.

63904028 is a deficient number, since it is larger than the sum of its proper divisors (52790452).

63904028 is a wasteful number, since it uses less digits than its factorization.

63904028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694636 (or 694634 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 63904028 is about 7993.9994996247. Note that the first 3 decimals coincide. The cubic root of 63904028 is about 399.7999583083.

The spelling of 63904028 in words is "sixty-three million, nine hundred four thousand, twenty-eight".