39979910 has 16 divisors (see below), whose sum is σ = 72950976. Its totient is φ = 15772608.

The previous prime is 39979897. The next prime is 39979963. The reversal of 39979910 is 1997993.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26654 + ... + 28113.

It is an arithmetic number, because the mean of its divisors is an integer number (4559436).

Almost surely, 2^39979910 is an apocalyptic number.

39979910 is a deficient number, since it is larger than the sum of its proper divisors (32971066).

39979910 is a wasteful number, since it uses less digits than its factorization.

39979910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54847.

The product of its (nonzero) digits is 137781, while the sum is 47.

The square root of 39979910 is about 6322.9668669067. The cubic root of 39979910 is about 341.9379240525.

The spelling of 39979910 in words is "thirty-nine million, nine hundred seventy-nine thousand, nine hundred ten".