64912728 has 16 divisors (see below), whose sum is σ = 162281880. Its totient is φ = 21637568.

The previous prime is 64912711. The next prime is 64912753. The reversal of 64912728 is 82721946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352325 + ... + 1352372.

Almost surely, 2^64912728 is an apocalyptic number.

It is an amenable number.

64912728 is an abundant number, since it is smaller than the sum of its proper divisors (97369152).

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

64912728 is a wasteful number, since it uses less digits than its factorization.

64912728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2704706 (or 2704702 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 64912728 is about 8056.8435506717. The cubic root of 64912728 is about 401.8925481979.

The spelling of 64912728 in words is "sixty-four million, nine hundred twelve thousand, seven hundred twenty-eight".