39138902 has 12 divisors (see below), whose sum is σ = 64531068. Its totient is φ = 17790300.

The previous prime is 39138863. The next prime is 39138919. The reversal of 39138902 is 20983193.

39138902 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 80624 + ... + 81107.

It is an arithmetic number, because the mean of its divisors is an integer number (5377589).

Almost surely, 2^39138902 is an apocalyptic number.

39138902 is a deficient number, since it is larger than the sum of its proper divisors (25392166).

39138902 is a wasteful number, since it uses less digits than its factorization.

39138902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161755 (or 161744 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 39138902 is about 6256.1091742392. The cubic root of 39138902 is about 339.5232707386.

It can be divided in two parts, 391 and 38902, that added together give a palindrome (39293).

The spelling of 39138902 in words is "thirty-nine million, one hundred thirty-eight thousand, nine hundred two".