64044392 has 8 divisors (see below), whose sum is σ = 120083250. Its totient is φ = 32022192.

The previous prime is 64044391. The next prime is 64044413. The reversal of 64044392 is 29344046.

It can be written as a sum of positive squares in only one way, i.e., 53377636 + 10666756 = 7306^2 + 3266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (64044391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4002767 + ... + 4002782.

Almost surely, 2^64044392 is an apocalyptic number.

It is an amenable number.

64044392 is a deficient number, since it is larger than the sum of its proper divisors (56038858).

64044392 is a wasteful number, since it uses less digits than its factorization.

64044392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8005555 (or 8005551 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 64044392 is about 8002.7740190511. The cubic root of 64044392 is about 400.0924619587.

The spelling of 64044392 in words is "sixty-four million, forty-four thousand, three hundred ninety-two".