39904424 has 24 divisors (see below), whose sum is σ = 87037290. Its totient is φ = 17101728.

The previous prime is 39904421. The next prime is 39904429. The reversal of 39904424 is 42440993.

It can be written as a sum of positive squares in only one way, i.e., 20702500 + 19201924 = 4550^2 + 4382^2 .

It is not an unprimeable number, because it can be changed into a prime (39904421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50507 + ... + 51290.

Almost surely, 2^39904424 is an apocalyptic number.

It is an amenable number.

39904424 is an abundant number, since it is smaller than the sum of its proper divisors (47132866).

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

39904424 is a wasteful number, since it uses less digits than its factorization.

39904424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101817 (or 101806 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 39904424 is about 6316.9948551507. The cubic root of 39904424 is about 341.7225843306.

The spelling of 39904424 in words is "thirty-nine million, nine hundred four thousand, four hundred twenty-four".