39972308 has 12 divisors (see below), whose sum is σ = 70152180. Its totient is φ = 19928832.

The previous prime is 39972301. The next prime is 39972319. The reversal of 39972308 is 80327993.

It can be written as a sum of positive squares in 2 ways, for example, as 16662724 + 23309584 = 4082^2 + 4828^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39972301) 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, 12743 + ... + 15566.

It is an arithmetic number, because the mean of its divisors is an integer number (5846015).

Almost surely, 2^39972308 is an apocalyptic number.

It is an amenable number.

39972308 is a deficient number, since it is larger than the sum of its proper divisors (30179872).

39972308 is a wasteful number, since it uses less digits than its factorization.

39972308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28666 (or 28664 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 39972308 is about 6322.3656964779. The cubic root of 39972308 is about 341.9162500261.

The spelling of 39972308 in words is "thirty-nine million, nine hundred seventy-two thousand, three hundred eight".