64379880 has 64 divisors (see below), whose sum is σ = 214603200. Its totient is φ = 17167680.

The previous prime is 64379857. The next prime is 64379899. The reversal of 64379880 is 8897346.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28726 + ... + 30885.

It is an arithmetic number, because the mean of its divisors is an integer number (3353175).

Almost surely, 2^64379880 is an apocalyptic number.

64379880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64379880 is an abundant number, since it is smaller than the sum of its proper divisors (150223320).

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

64379880 is a wasteful number, since it uses less digits than its factorization.

64379880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59631 (or 59621 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 64379880 is about 8023.7073725305. The cubic root of 64379880 is about 400.7898559590.

The spelling of 64379880 in words is "sixty-four million, three hundred seventy-nine thousand, eight hundred eighty".