64939328 has 14 divisors (see below), whose sum is σ = 128864106. Its totient is φ = 32469632.

The previous prime is 64939309. The next prime is 64939333. The reversal of 64939328 is 82393946.

It can be written as a sum of positive squares in only one way, i.e., 48553024 + 16386304 = 6968^2 + 4048^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 507275 + ... + 507402.

It is an arithmetic number, because the mean of its divisors is an integer number (9204579).

Almost surely, 2^64939328 is an apocalyptic number.

It is an amenable number.

64939328 is a deficient number, since it is larger than the sum of its proper divisors (63924778).

64939328 is a wasteful number, since it uses less digits than its factorization.

64939328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014689 (or 1014679 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 64939328 is about 8058.4941521354. The cubic root of 64939328 is about 401.9474366725.

The spelling of 64939328 in words is "sixty-four million, nine hundred thirty-nine thousand, three hundred twenty-eight".