39974864 has 40 divisors (see below), whose sum is σ = 80203200. Its totient is φ = 19289088.

The previous prime is 39974861. The next prime is 39974867. The reversal of 39974864 is 46847993.

It is an interprime number because it is at equal distance from previous prime (39974861) and next prime (39974867).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39974861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66437 + ... + 67035.

It is an arithmetic number, because the mean of its divisors is an integer number (2005080).

Almost surely, 2^39974864 is an apocalyptic number.

It is an amenable number.

39974864 is an abundant number, since it is smaller than the sum of its proper divisors (40228336).

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

39974864 is a wasteful number, since it uses less digits than its factorization.

39974864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 747 (or 741 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 50.

The square root of 39974864 is about 6322.5678327717. The cubic root of 39974864 is about 341.9235377323.

The spelling of 39974864 in words is "thirty-nine million, nine hundred seventy-four thousand, eight hundred sixty-four".