138183556 has 12 divisors (see below), whose sum is σ = 276367168. Its totient is φ = 59221512.

The previous prime is 138183541. The next prime is 138183557. The reversal of 138183556 is 655381831.

138183556 = 2388² + 2389² + ... + 2411².

138183556 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138183557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2467536 + ... + 2467591.

Almost surely, 2^138183556 is an apocalyptic number.

It is an amenable number.

138183556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138183556 is a wasteful number, since it uses less digits than its factorization.

138183556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4935138 (or 4935136 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 138183556 is about 11755.1501904484. The cubic root of 138183556 is about 516.9939428148.

It can be divided in two parts, 1381 and 83556, that multiplied together give a triangular number (115390836 = T₁₅₁₉₁).

The spelling of 138183556 in words is "one hundred thirty-eight million, one hundred eighty-three thousand, five hundred fifty-six".