64724988 has 24 divisors (see below), whose sum is σ = 155107792. Its totient is φ = 20991744.

The previous prime is 64724987. The next prime is 64724999. The reversal of 64724988 is 88942746.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64724981) 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, 72445 + ... + 73332.

Almost surely, 2^64724988 is an apocalyptic number.

It is an amenable number.

64724988 is an abundant number, since it is smaller than the sum of its proper divisors (90382804).

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

64724988 is a wasteful number, since it uses less digits than its factorization.

64724988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145821 (or 145819 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 64724988 is about 8045.1841495394. The cubic root of 64724988 is about 401.5047240824.

The spelling of 64724988 in words is "sixty-four million, seven hundred twenty-four thousand, nine hundred eighty-eight".