64878328 has 16 divisors (see below), whose sum is σ = 121801680. Its totient is φ = 32397888.

The previous prime is 64878323. The next prime is 64878329. The reversal of 64878328 is 82387846.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64878323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2125 + ... + 11587.

It is an arithmetic number, because the mean of its divisors is an integer number (7612605).

Almost surely, 2^64878328 is an apocalyptic number.

It is an amenable number.

64878328 is a deficient number, since it is larger than the sum of its proper divisors (56923352).

64878328 is a wasteful number, since it uses less digits than its factorization.

64878328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10326 (or 10322 counting only the distinct ones).

The product of its digits is 516096, while the sum is 46.

The square root of 64878328 is about 8054.7084366847. The cubic root of 64878328 is about 401.8215423670.

The spelling of 64878328 in words is "sixty-four million, eight hundred seventy-eight thousand, three hundred twenty-eight".