39940902 has 24 divisors (see below), whose sum is σ = 86725080. Its totient is φ = 13284960.

The previous prime is 39940897. The next prime is 39940919. The reversal of 39940902 is 20904993.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7249 + ... + 11507.

It is an arithmetic number, because the mean of its divisors is an integer number (3613545).

Almost surely, 2^39940902 is an apocalyptic number.

39940902 is an abundant number, since it is smaller than the sum of its proper divisors (46784178).

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

39940902 is a wasteful number, since it uses less digits than its factorization.

39940902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788 (or 4785 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 39940902 is about 6319.8814862306. The cubic root of 39940902 is about 341.8266793889.

The spelling of 39940902 in words is "thirty-nine million, nine hundred forty thousand, nine hundred two".