39975864 has 32 divisors (see below), whose sum is σ = 103165440. Its totient is φ = 12895200.

The previous prime is 39975851. The next prime is 39975869. The reversal of 39975864 is 46857993.

It is a super-3 number, since 3×39975864³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39975869) 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, 26122 + ... + 27609.

It is an arithmetic number, because the mean of its divisors is an integer number (3223920).

Almost surely, 2^39975864 is an apocalyptic number.

It is an amenable number.

39975864 is an abundant number, since it is smaller than the sum of its proper divisors (63189576).

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

39975864 is a wasteful number, since it uses less digits than its factorization.

39975864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53771 (or 53767 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 51.

The square root of 39975864 is about 6322.6469140701. The cubic root of 39975864 is about 341.9263888630.

The spelling of 39975864 in words is "thirty-nine million, nine hundred seventy-five thousand, eight hundred sixty-four".