39920680 has 16 divisors (see below), whose sum is σ = 89821620. Its totient is φ = 15968256.

The previous prime is 39920651. The next prime is 39920687. The reversal of 39920680 is 8602993.

It can be written as a sum of positive squares in 2 ways, for example, as 36024004 + 3896676 = 6002^2 + 1974^2 .

It is not an unprimeable number, because it can be changed into a prime (39920687) 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, 498969 + ... + 499048.

Almost surely, 2^39920680 is an apocalyptic number.

It is an amenable number.

39920680 is an abundant number, since it is smaller than the sum of its proper divisors (49900940).

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

39920680 is a wasteful number, since it uses less digits than its factorization.

39920680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998028 (or 998024 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 39920680 is about 6318.2814119031. The cubic root of 39920680 is about 341.7689809255.

The spelling of 39920680 in words is "thirty-nine million, nine hundred twenty thousand, six hundred eighty".