138022556 has 12 divisors (see below), whose sum is σ = 276045168. Its totient is φ = 59152512.

The previous prime is 138022553. The next prime is 138022567. The reversal of 138022556 is 655220831.

138022556 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138022553) 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, 2464661 + ... + 2464716.

It is an arithmetic number, because the mean of its divisors is an integer number (23003764).

Almost surely, 2^138022556 is an apocalyptic number.

It is an amenable number.

138022556 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.

138022556 is a wasteful number, since it uses less digits than its factorization.

138022556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4929388 (or 4929386 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 138022556 is about 11748.3001323596. The cubic root of 138022556 is about 516.7930786534.

The spelling of 138022556 in words is "one hundred thirty-eight million, twenty-two thousand, five hundred fifty-six".