39904695 has 24 divisors (see below), whose sum is σ = 73238256. Its totient is φ = 20030208.

The previous prime is 39904681. The next prime is 39904703. The reversal of 39904695 is 59640993.

It is a happy number.

It is not a de Polignac number, because 39904695 - 2⁴ = 39904679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 39904695.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25317 + ... + 26846.

It is an arithmetic number, because the mean of its divisors is an integer number (3051594).

Almost surely, 2^39904695 is an apocalyptic number.

39904695 is a deficient number, since it is larger than the sum of its proper divisors (33333561).

39904695 is a wasteful number, since it uses less digits than its factorization.

39904695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52191 (or 52188 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 39904695 is about 6317.0163051871. The cubic root of 39904695 is about 341.7233579008.

The spelling of 39904695 in words is "thirty-nine million, nine hundred four thousand, six hundred ninety-five".