138379256 has 8 divisors (see below), whose sum is σ = 259461120. Its totient is φ = 69189624.

The previous prime is 138379229. The next prime is 138379259. The reversal of 138379256 is 652973831.

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

It is a super-2 number, since 2×138379256² = 38297636982227072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138379259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8648696 + ... + 8648711.

It is an arithmetic number, because the mean of its divisors is an integer number (32432640).

Almost surely, 2^138379256 is an apocalyptic number.

It is an amenable number.

138379256 is a deficient number, since it is larger than the sum of its proper divisors (121081864).

138379256 is a wasteful number, since it uses less digits than its factorization.

138379256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17297413 (or 17297409 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The square root of 138379256 is about 11763.4712563937. The cubic root of 138379256 is about 517.2378888441.

The spelling of 138379256 in words is "one hundred thirty-eight million, three hundred seventy-nine thousand, two hundred fifty-six".