138876556 has 24 divisors (see below), whose sum is σ = 299119520. Its totient is φ = 54940032.

The previous prime is 138876547. The next prime is 138876593. The reversal of 138876556 is 655678831.

138876556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138876556² = 38573395612842272, which contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 190401 + ... + 191128.

Almost surely, 2^138876556 is an apocalyptic number.

It is an amenable number.

138876556 is an abundant number, since it is smaller than the sum of its proper divisors (160242964).

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

138876556 is a wasteful number, since it uses less digits than its factorization.

138876556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381553 (or 381551 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 49.

The square root of 138876556 is about 11784.5897679979. The cubic root of 138876556 is about 517.8567554106.

The spelling of 138876556 in words is "one hundred thirty-eight million, eight hundred seventy-six thousand, five hundred fifty-six".