64885632 has 128 divisors (see below), whose sum is σ = 199756800. Its totient is φ = 18278400.

The previous prime is 64885619. The next prime is 64885637. The reversal of 64885632 is 23658846.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64885637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271369 + ... + 271607.

It is an arithmetic number, because the mean of its divisors is an integer number (1560600).

Almost surely, 2^64885632 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 64885632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99878400).

64885632 is an abundant number, since it is smaller than the sum of its proper divisors (134871168).

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

64885632 is a wasteful number, since it uses less digits than its factorization.

64885632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 352 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 64885632 is about 8055.1618233279. The cubic root of 64885632 is about 401.8366208198.

The spelling of 64885632 in words is "sixty-four million, eight hundred eighty-five thousand, six hundred thirty-two".