39960920 has 16 divisors (see below), whose sum is σ = 89912160. Its totient is φ = 15984352.

The previous prime is 39960901. The next prime is 39960923. The reversal of 39960920 is 2906993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39960923) 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, 499472 + ... + 499551.

It is an arithmetic number, because the mean of its divisors is an integer number (5619510).

Almost surely, 2^39960920 is an apocalyptic number.

It is an amenable number.

39960920 is an abundant number, since it is smaller than the sum of its proper divisors (49951240).

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

39960920 is a wasteful number, since it uses less digits than its factorization.

39960920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999034 (or 999030 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 39960920 is about 6321.4650200725. The cubic root of 39960920 is about 341.8837766107.

The spelling of 39960920 in words is "thirty-nine million, nine hundred sixty thousand, nine hundred twenty".