39242644638 has 32 divisors (see below), whose sum is σ = 79673704704. Its totient is φ = 12882895872.

The previous prime is 39242644627. The next prime is 39242644681. The reversal of 39242644638 is 83644624293.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2858206 + ... + 2871902.

It is an arithmetic number, because the mean of its divisors is an integer number (2489803272).

Almost surely, 2^39242644638 is an apocalyptic number.

39242644638 is an abundant number, since it is smaller than the sum of its proper divisors (40431060066).

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

39242644638 is a wasteful number, since it uses less digits than its factorization.

39242644638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20896.

The product of its digits is 5971968, while the sum is 51.

The spelling of 39242644638 in words is "thirty-nine billion, two hundred forty-two million, six hundred forty-four thousand, six hundred thirty-eight".