138635996 has 24 divisors (see below), whose sum is σ = 253607424. Its totient is φ = 66187440.

The previous prime is 138635957. The next prime is 138636049. The reversal of 138635996 is 699536831.

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 7 ways as a sum of consecutive naturals, for example, 74801 + ... + 76631.

It is an arithmetic number, because the mean of its divisors is an integer number (10566976).

Almost surely, 2^138635996 is an apocalyptic number.

It is an amenable number.

138635996 is a deficient number, since it is larger than the sum of its proper divisors (114971428).

138635996 is a wasteful number, since it uses less digits than its factorization.

138635996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681 (or 2679 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 50.

The square root of 138635996 is about 11774.3787946541. The cubic root of 138635996 is about 517.5575745569.

The spelling of 138635996 in words is "one hundred thirty-eight million, six hundred thirty-five thousand, nine hundred ninety-six".