64784864 has 24 divisors (see below), whose sum is σ = 127724688. Its totient is φ = 32346880.

The previous prime is 64784861. The next prime is 64784887. The reversal of 64784864 is 46848746.

64784864 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 not an unprimeable number, because it can be changed into a prime (64784861) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 43004 + ... + 44484.

It is an arithmetic number, because the mean of its divisors is an integer number (5321862).

Almost surely, 2^64784864 is an apocalyptic number.

It is an amenable number.

64784864 is a deficient number, since it is larger than the sum of its proper divisors (62939824).

64784864 is a wasteful number, since it uses less digits than its factorization.

64784864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858 (or 2850 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 47.

The square root of 64784864 is about 8048.9045217346. The cubic root of 64784864 is about 401.6284943513.

The spelling of 64784864 in words is "sixty-four million, seven hundred eighty-four thousand, eight hundred sixty-four".