64644304 has 20 divisors (see below), whose sum is σ = 125576164. Its totient is φ = 32237568.

The previous prime is 64644299. The next prime is 64644311. The reversal of 64644304 is 40344646.

64644304 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 42928704 + 21715600 = 6552^2 + 4660^2 .

It is a congruent number.

It is an unprimeable number.

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, 1264 + ... + 11440.

Almost surely, 2^64644304 is an apocalyptic number.

It is an amenable number.

64644304 is a deficient number, since it is larger than the sum of its proper divisors (60931860).

64644304 is a wasteful number, since it uses less digits than its factorization.

64644304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10582 (or 10576 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 64644304 is about 8040.1681574455. The cubic root of 64644304 is about 401.3378206018.

The spelling of 64644304 in words is "sixty-four million, six hundred forty-four thousand, three hundred four".