38639664 has 60 divisors (see below), whose sum is σ = 123588816. Its totient is φ = 11039616.

The previous prime is 38639651. The next prime is 38639677. The reversal of 38639664 is 46693683.

38639664 is a `hidden beast` number, since 3 + 8 + 639 + 6 + 6 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (38639651) and next prime (38639677).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18159 + ... + 20174.

Almost surely, 2^38639664 is an apocalyptic number.

It is an amenable number.

38639664 is an abundant number, since it is smaller than the sum of its proper divisors (84949152).

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

38639664 is a wasteful number, since it uses less digits than its factorization.

38639664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38354 (or 38345 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 38639664 is about 6216.0810805523. The cubic root of 38639664 is about 338.0734875167.

The spelling of 38639664 in words is "thirty-eight million, six hundred thirty-nine thousand, six hundred sixty-four".