64973232 has 40 divisors (see below), whose sum is σ = 186498480. Its totient is φ = 21657600.

The previous prime is 64973203. The next prime is 64973239. The reversal of 64973232 is 23237946.

It is a happy number.

64973232 is a `hidden beast` number, since 649 + 7 + 3 + 2 + 3 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64973239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74769 + ... + 75632.

It is an arithmetic number, because the mean of its divisors is an integer number (4662462).

Almost surely, 2^64973232 is an apocalyptic number.

It is an amenable number.

64973232 is an abundant number, since it is smaller than the sum of its proper divisors (121525248).

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

64973232 is a wasteful number, since it uses less digits than its factorization.

64973232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150418 (or 150406 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 64973232 is about 8060.5974964639. The cubic root of 64973232 is about 402.0173750565.

The spelling of 64973232 in words is "sixty-four million, nine hundred seventy-three thousand, two hundred thirty-two".