138022056 has 48 divisors (see below), whose sum is σ = 387660000. Its totient is φ = 46006704.

The previous prime is 138022007. The next prime is 138022081. The reversal of 138022056 is 650220831.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33556 + ... + 37443.

It is an arithmetic number, because the mean of its divisors is an integer number (8076250).

Almost surely, 2^138022056 is an apocalyptic number.

It is an amenable number.

138022056 is an abundant number, since it is smaller than the sum of its proper divisors (249637944).

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

138022056 is an equidigital number, since it uses as much as digits as its factorization.

138022056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71020 (or 71004 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 138022056 is about 11748.2788526660. The cubic root of 138022056 is about 516.7924546084.

Adding to 138022056 its reverse (650220831), we get a palindrome (788242887).

It can be divided in two parts, 1380 and 22056, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 138022056 in words is "one hundred thirty-eight million, twenty-two thousand, fifty-six".