38645864 has 32 divisors (see below), whose sum is σ = 75508200. Its totient is φ = 18520320.

The previous prime is 38645857. The next prime is 38645881. The reversal of 38645864 is 46854683.

It can be written as a sum of positive squares in 4 ways, for example, as 32604100 + 6041764 = 5710^2 + 2458^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35894 + ... + 36954.

Almost surely, 2^38645864 is an apocalyptic number.

It is an amenable number.

38645864 is a deficient number, since it is larger than the sum of its proper divisors (36862336).

38645864 is a wasteful number, since it uses less digits than its factorization.

38645864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1253 (or 1249 counting only the distinct ones).

The product of its digits is 552960, while the sum is 44.

The square root of 38645864 is about 6216.5797670423. The cubic root of 38645864 is about 338.0915686222.

The spelling of 38645864 in words is "thirty-eight million, six hundred forty-five thousand, eight hundred sixty-four".