138359856 has 20 divisors (see below), whose sum is σ = 357429752. Its totient is φ = 46119936.

The previous prime is 138359833. The next prime is 138359867. The reversal of 138359856 is 658953831.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 2882497 = 138359856 / (1 + 3 + 8 + 3 + 5 + 9 + 8 + 5 + 6).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1441201 + ... + 1441296.

Almost surely, 2^138359856 is an apocalyptic number.

138359856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138359856 is an abundant number, since it is smaller than the sum of its proper divisors (219069896).

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

138359856 is a wasteful number, since it uses less digits than its factorization.

138359856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2882508 (or 2882502 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 138359856 is about 11762.6466409563. The cubic root of 138359856 is about 517.2137164252.

The spelling of 138359856 in words is "one hundred thirty-eight million, three hundred fifty-nine thousand, eight hundred fifty-six".