138312456 has 16 divisors (see below), whose sum is σ = 345781200. Its totient is φ = 46104144.

The previous prime is 138312439. The next prime is 138312469. The reversal of 138312456 is 654213831.

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, 2881486 + ... + 2881533.

It is an arithmetic number, because the mean of its divisors is an integer number (21611325).

Almost surely, 2^138312456 is an apocalyptic number.

It is an amenable number.

138312456 is an abundant number, since it is smaller than the sum of its proper divisors (207468744).

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

138312456 is a wasteful number, since it uses less digits than its factorization.

138312456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763028 (or 5763024 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 138312456 is about 11760.6316156914. The cubic root of 138312456 is about 517.1546464729.

The spelling of 138312456 in words is "one hundred thirty-eight million, three hundred twelve thousand, four hundred fifty-six".