64399032 has 24 divisors (see below), whose sum is σ = 174414240. Its totient is φ = 21466320.

The previous prime is 64399021. The next prime is 64399051. The reversal of 64399032 is 23099346.

It is a happy number.

64399032 is a `hidden beast` number, since 643 + 9 + 9 + 0 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 447144 + ... + 447287.

It is an arithmetic number, because the mean of its divisors is an integer number (7267260).

Almost surely, 2^64399032 is an apocalyptic number.

It is an amenable number.

64399032 is an abundant number, since it is smaller than the sum of its proper divisors (110015208).

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

64399032 is a wasteful number, since it uses less digits than its factorization.

64399032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 894443 (or 894436 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 64399032 is about 8024.9007470498. The cubic root of 64399032 is about 400.8295949079.

The spelling of 64399032 in words is "sixty-four million, three hundred ninety-nine thousand, thirty-two".