64731312 has 60 divisors (see below), whose sum is σ = 187878600. Its totient is φ = 21575808.

The previous prime is 64731311. The next prime is 64731341. The reversal of 64731312 is 21313746.

64731312 is a `hidden beast` number, since 647 + 3 + 1 + 3 + 12 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (64731311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4437 + ... + 12212.

It is an arithmetic number, because the mean of its divisors is an integer number (3131310).

Almost surely, 2^64731312 is an apocalyptic number.

It is an amenable number.

64731312 is an abundant number, since it is smaller than the sum of its proper divisors (123147288).

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

64731312 is a wasteful number, since it uses less digits than its factorization.

64731312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16672 (or 16654 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 64731312 is about 8045.5771700979. The cubic root of 64731312 is about 401.5178000893.

The spelling of 64731312 in words is "sixty-four million, seven hundred thirty-one thousand, three hundred twelve".