64605388 has 12 divisors (see below), whose sum is σ = 116958240. Its totient is φ = 31188752.

The previous prime is 64605383. The next prime is 64605419. The reversal of 64605388 is 88350646.

It is a self number, because there is not a number n which added to its sum of digits gives 64605388.

It is not an unprimeable number, because it can be changed into a prime (64605383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278356 + ... + 278587.

It is an arithmetic number, because the mean of its divisors is an integer number (9746520).

Almost surely, 2^64605388 is an apocalyptic number.

It is an amenable number.

64605388 is a deficient number, since it is larger than the sum of its proper divisors (52352852).

64605388 is a wasteful number, since it uses less digits than its factorization.

64605388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556976 (or 556974 counting only the distinct ones).

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

The square root of 64605388 is about 8037.7476944726. The cubic root of 64605388 is about 401.2572690460.

It can be divided in two parts, 64605 and 388, that multiplied together give a triangular number (25066740 = T₇₀₈₀).

The spelling of 64605388 in words is "sixty-four million, six hundred five thousand, three hundred eighty-eight".