39990564 has 48 divisors (see below), whose sum is σ = 104059200. Its totient is φ = 13281408.

The previous prime is 39990547. The next prime is 39990571. The reversal of 39990564 is 46509993.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40444 + ... + 41420.

It is an arithmetic number, because the mean of its divisors is an integer number (2167900).

Almost surely, 2^39990564 is an apocalyptic number.

It is an amenable number.

39990564 is an abundant number, since it is smaller than the sum of its proper divisors (64068636).

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

39990564 is a wasteful number, since it uses less digits than its factorization.

39990564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1369 (or 1361 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 39990564 is about 6323.8092950373. The cubic root of 39990564 is about 341.9682949987.

The spelling of 39990564 in words is "thirty-nine million, nine hundred ninety thousand, five hundred sixty-four".