42039908 has 18 divisors (see below), whose sum is σ = 76200306. Its totient is φ = 20293504.

The previous prime is 42039901. The next prime is 42039931. The reversal of 42039908 is 80993024.

It can be written as a sum of positive squares in 3 ways, for example, as 7441984 + 34597924 = 2728^2 + 5882^2 .

It is not an unprimeable number, because it can be changed into a prime (42039901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2885 + ... + 9612.

Almost surely, 2^42039908 is an apocalyptic number.

It is an amenable number.

42039908 is a deficient number, since it is larger than the sum of its proper divisors (34160398).

42039908 is a wasteful number, since it uses less digits than its factorization.

42039908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12559 (or 12528 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 42039908 is about 6483.8189363985. The cubic root of 42039908 is about 347.7127258833.

The spelling of 42039908 in words is "forty-two million, thirty-nine thousand, nine hundred eight".