39906872 has 16 divisors (see below), whose sum is σ = 74892600. Its totient is φ = 19935520.

The previous prime is 39906847. The next prime is 39906883. The reversal of 39906872 is 27860993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15347 + ... + 17757.

Almost surely, 2^39906872 is an apocalyptic number.

It is an amenable number.

39906872 is a deficient number, since it is larger than the sum of its proper divisors (34985728).

39906872 is a wasteful number, since it uses less digits than its factorization.

39906872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4486 (or 4482 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 39906872 is about 6317.1886151990. The cubic root of 39906872 is about 341.7295720252.

The spelling of 39906872 in words is "thirty-nine million, nine hundred six thousand, eight hundred seventy-two".