64709388 has 48 divisors (see below), whose sum is σ = 168255360. Its totient is φ = 21506832.

The previous prime is 64709377. The next prime is 64709417. The reversal of 64709388 is 88390746.

It is a happy number.

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, 49795 + ... + 51077.

It is an arithmetic number, because the mean of its divisors is an integer number (3505320).

Almost surely, 2^64709388 is an apocalyptic number.

It is an amenable number.

64709388 is an abundant number, since it is smaller than the sum of its proper divisors (103545972).

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

64709388 is a wasteful number, since it uses less digits than its factorization.

64709388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763 (or 1755 counting only the distinct ones).

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

The square root of 64709388 is about 8044.2145670040. The cubic root of 64709388 is about 401.4724646353.

The spelling of 64709388 in words is "sixty-four million, seven hundred nine thousand, three hundred eighty-eight".