63998904 has 32 divisors (see below), whose sum is σ = 160352640. Its totient is φ = 21285600.

The previous prime is 63998887. The next prime is 63998923. The reversal of 63998904 is 40989936.

It is a happy number.

63998904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9069 + ... + 14499.

It is an arithmetic number, because the mean of its divisors is an integer number (5011020).

Almost surely, 2^63998904 is an apocalyptic number.

It is an amenable number.

63998904 is an abundant number, since it is smaller than the sum of its proper divisors (96353736).

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

63998904 is a wasteful number, since it uses less digits than its factorization.

63998904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5931 (or 5927 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 63998904 is about 7999.9314997067. The cubic root of 63998904 is about 399.9977166536.

The spelling of 63998904 in words is "sixty-three million, nine hundred ninety-eight thousand, nine hundred four".