39881616 has 40 divisors (see below), whose sum is σ = 104573664. Its totient is φ = 13094400.

The previous prime is 39881603. The next prime is 39881651. The reversal of 39881616 is 61618893.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2985 + ... + 9416.

Almost surely, 2^39881616 is an apocalyptic number.

It is an amenable number.

39881616 is an abundant number, since it is smaller than the sum of its proper divisors (64692048).

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

39881616 is a wasteful number, since it uses less digits than its factorization.

39881616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12479 (or 12473 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 39881616 is about 6315.1893083264. The cubic root of 39881616 is about 341.6574662867.

The spelling of 39881616 in words is "thirty-nine million, eight hundred eighty-one thousand, six hundred sixteen".