39928042 has 24 divisors (see below), whose sum is σ = 76006080. Its totient is φ = 15555960.

The previous prime is 39928039. The next prime is 39928079. The reversal of 39928042 is 24082993.

It is a junction number, because it is equal to n+sod(n) for n = 39927992 and 39928010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17442 + ... + 19597.

It is an arithmetic number, because the mean of its divisors is an integer number (3166920).

Almost surely, 2^39928042 is an apocalyptic number.

39928042 is a deficient number, since it is larger than the sum of its proper divisors (36078038).

39928042 is a wasteful number, since it uses less digits than its factorization.

39928042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37066 (or 37059 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 39928042 is about 6318.8639801787. The cubic root of 39928042 is about 341.7899888223.

It can be divided in two parts, 399 and 28042, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 39928042 in words is "thirty-nine million, nine hundred twenty-eight thousand, forty-two".