39942942 has 32 divisors (see below), whose sum is σ = 88811520. Its totient is φ = 11892960.

The previous prime is 39942923. The next prime is 39942971. The reversal of 39942942 is 24924993.

It is a junction number, because it is equal to n+sod(n) for n = 39942894 and 39942903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5842 + ... + 10677.

It is an arithmetic number, because the mean of its divisors is an integer number (2775360).

Almost surely, 2^39942942 is an apocalyptic number.

39942942 is an abundant number, since it is smaller than the sum of its proper divisors (48868578).

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

39942942 is a wasteful number, since it uses less digits than its factorization.

39942942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16568.

The product of its digits is 139968, while the sum is 42.

The square root of 39942942 is about 6320.0428796014. The cubic root of 39942942 is about 341.8324989416.

The spelling of 39942942 in words is "thirty-nine million, nine hundred forty-two thousand, nine hundred forty-two".