38990864 has 20 divisors (see below), whose sum is σ = 82412880. Its totient is φ = 17723040.

The previous prime is 38990863. The next prime is 38990879. The reversal of 38990864 is 46809983.

It is not an unprimeable number, because it can be changed into a prime (38990863) 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, 110594 + ... + 110945.

It is an arithmetic number, because the mean of its divisors is an integer number (4120644).

Almost surely, 2^38990864 is an apocalyptic number.

It is an amenable number.

38990864 is an abundant number, since it is smaller than the sum of its proper divisors (43422016).

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

38990864 is a wasteful number, since it uses less digits than its factorization.

38990864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221558 (or 221552 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 38990864 is about 6244.2664901492. The cubic root of 38990864 is about 339.0946617994.

The spelling of 38990864 in words is "thirty-eight million, nine hundred ninety thousand, eight hundred sixty-four".