64879904 has 12 divisors (see below), whose sum is σ = 127732374. Its totient is φ = 32439936.

The previous prime is 64879901. The next prime is 64879909. The reversal of 64879904 is 40997846.

It can be written as a sum of positive squares in only one way, i.e., 64320400 + 559504 = 8020^2 + 748^2 .

It is not an unprimeable number, because it can be changed into a prime (64879901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013717 + ... + 1013780.

Almost surely, 2^64879904 is an apocalyptic number.

It is an amenable number.

64879904 is a deficient number, since it is larger than the sum of its proper divisors (62852470).

64879904 is a wasteful number, since it uses less digits than its factorization.

64879904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027507 (or 2027499 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 64879904 is about 8054.8062670681. The cubic root of 64879904 is about 401.8247959734.

The spelling of 64879904 in words is "sixty-four million, eight hundred seventy-nine thousand, nine hundred four".