138956264 has 8 divisors (see below), whose sum is σ = 260543010. Its totient is φ = 69478128.

The previous prime is 138956243. The next prime is 138956297. The reversal of 138956264 is 462659831.

It can be written as a sum of positive squares in only one way, i.e., 109035364 + 29920900 = 10442^2 + 5470^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8684759 + ... + 8684774.

Almost surely, 2^138956264 is an apocalyptic number.

It is an amenable number.

138956264 is a deficient number, since it is larger than the sum of its proper divisors (121586746).

138956264 is a wasteful number, since it uses less digits than its factorization.

138956264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17369539 (or 17369535 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 138956264 is about 11787.9711570736. The cubic root of 138956264 is about 517.9558108426.

The spelling of 138956264 in words is "one hundred thirty-eight million, nine hundred fifty-six thousand, two hundred sixty-four".