64904856 has 32 divisors (see below), whose sum is σ = 163123200. Its totient is φ = 21520160.

The previous prime is 64904837. The next prime is 64904881. The reversal of 64904856 is 65840946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2496 + ... + 11663.

It is an arithmetic number, because the mean of its divisors is an integer number (5097600).

Almost surely, 2^64904856 is an apocalyptic number.

It is an amenable number.

64904856 is an abundant number, since it is smaller than the sum of its proper divisors (98218344).

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

64904856 is a wasteful number, since it uses less digits than its factorization.

64904856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14359 (or 14355 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 64904856 is about 8056.3550070736. The cubic root of 64904856 is about 401.8763016356.

The spelling of 64904856 in words is "sixty-four million, nine hundred four thousand, eight hundred fifty-six".