64385988 has 24 divisors (see below), whose sum is σ = 152698560. Its totient is φ = 21109920.

The previous prime is 64385983. The next prime is 64385989. The reversal of 64385988 is 88958346.

It is a super-2 number, since 2×64385988² = 8291110901472288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64385988.

It is not an unprimeable number, because it can be changed into a prime (64385983) 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, 43248 + ... + 44711.

It is an arithmetic number, because the mean of its divisors is an integer number (6362440).

Almost surely, 2^64385988 is an apocalyptic number.

It is an amenable number.

64385988 is an abundant number, since it is smaller than the sum of its proper divisors (88312572).

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

64385988 is a wasteful number, since it uses less digits than its factorization.

64385988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88027 (or 88025 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 64385988 is about 8024.0879855595. The cubic root of 64385988 is about 400.8025304520.

The spelling of 64385988 in words is "sixty-four million, three hundred eighty-five thousand, nine hundred eighty-eight".