64309892 has 6 divisors (see below), whose sum is σ = 112542318. Its totient is φ = 32154944.

The previous prime is 64309877. The next prime is 64309901. The reversal of 64309892 is 29890346.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 58277956 + 6031936 = 7634^2 + 2456^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8038733 + ... + 8038740.

It is an arithmetic number, because the mean of its divisors is an integer number (18757053).

Almost surely, 2^64309892 is an apocalyptic number.

It is an amenable number.

64309892 is a deficient number, since it is larger than the sum of its proper divisors (48232426).

64309892 is a wasteful number, since it uses less digits than its factorization.

64309892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16077477 (or 16077475 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 64309892 is about 8019.3448610220. The cubic root of 64309892 is about 400.6445691021.

The spelling of 64309892 in words is "sixty-four million, three hundred nine thousand, eight hundred ninety-two".