64865380 has 24 divisors (see below), whose sum is σ = 138253248. Its totient is φ = 25558368.

The previous prime is 64865363. The next prime is 64865407. The reversal of 64865380 is 8356846.

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, 22864 + ... + 25543.

It is an arithmetic number, because the mean of its divisors is an integer number (5760552).

Almost surely, 2^64865380 is an apocalyptic number.

It is an amenable number.

64865380 is an abundant number, since it is smaller than the sum of its proper divisors (73387868).

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

64865380 is a wasteful number, since it uses less digits than its factorization.

64865380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48483 (or 48481 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 64865380 is about 8053.9046430908. The cubic root of 64865380 is about 401.7948096010.

The spelling of 64865380 in words is "sixty-four million, eight hundred sixty-five thousand, three hundred eighty".