138956622 has 32 divisors (see below), whose sum is σ = 317969664. Its totient is φ = 39657600.

The previous prime is 138956617. The next prime is 138956647. The reversal of 138956622 is 226659831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63222 + ... + 65382.

It is an arithmetic number, because the mean of its divisors is an integer number (9936552).

Almost surely, 2^138956622 is an apocalyptic number.

138956622 is an abundant number, since it is smaller than the sum of its proper divisors (179013042).

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

138956622 is a wasteful number, since it uses less digits than its factorization.

138956622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3704.

The product of its digits is 155520, while the sum is 42.

The square root of 138956622 is about 11787.9863420348. The cubic root of 138956622 is about 517.9562556541.

The spelling of 138956622 in words is "one hundred thirty-eight million, nine hundred fifty-six thousand, six hundred twenty-two".