64396032 has 72 divisors (see below), whose sum is σ = 172677120. Its totient is φ = 21304320.

The previous prime is 64396019. The next prime is 64396043. The reversal of 64396032 is 23069346.

It is a junction number, because it is equal to n+sod(n) for n = 64395984 and 64396002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146469 + ... + 146907.

Almost surely, 2^64396032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64396032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86338560).

64396032 is an abundant number, since it is smaller than the sum of its proper divisors (108281088).

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

64396032 is a wasteful number, since it uses less digits than its factorization.

64396032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 64396032 is about 8024.7138266732. The cubic root of 64396032 is about 400.8233706557.

The spelling of 64396032 in words is "sixty-four million, three hundred ninety-six thousand, thirty-two".