39918828 has 12 divisors (see below), whose sum is σ = 93143960. Its totient is φ = 13306272.

The previous prime is 39918821. The next prime is 39918841. The reversal of 39918828 is 82881993.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (39918821) 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, 1663273 + ... + 1663296.

Almost surely, 2^39918828 is an apocalyptic number.

It is an amenable number.

39918828 is an abundant number, since it is smaller than the sum of its proper divisors (53225132).

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

39918828 is a wasteful number, since it uses less digits than its factorization.

39918828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326576 (or 3326574 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 39918828 is about 6318.1348513624. The cubic root of 39918828 is about 341.7636957288.

The spelling of 39918828 in words is "thirty-nine million, nine hundred eighteen thousand, eight hundred twenty-eight".