138353872 has 20 divisors (see below), whose sum is σ = 268554240. Its totient is φ = 69049568.

The previous prime is 138353863. The next prime is 138353893. The reversal of 138353872 is 278353831.

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 3 ways as a sum of consecutive naturals, for example, 1329 + ... + 16687.

It is an arithmetic number, because the mean of its divisors is an integer number (13427712).

Almost surely, 2^138353872 is an apocalyptic number.

It is an amenable number.

138353872 is a deficient number, since it is larger than the sum of its proper divisors (130200368).

138353872 is a wasteful number, since it uses less digits than its factorization.

138353872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15930 (or 15924 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 138353872 is about 11762.3922736831. The cubic root of 138353872 is about 517.2062598995.

It can be divided in two parts, 1383 and 53872, that added together give a palindrome (55255).

The spelling of 138353872 in words is "one hundred thirty-eight million, three hundred fifty-three thousand, eight hundred seventy-two".