138227644 has 12 divisors (see below), whose sum is σ = 242009824. Its totient is φ = 69081984.

The previous prime is 138227599. The next prime is 138227669. The reversal of 138227644 is 446722831.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3709 + ... + 17035.

Almost surely, 2^138227644 is an apocalyptic number.

It is an amenable number.

138227644 is a deficient number, since it is larger than the sum of its proper divisors (103782180).

138227644 is a wasteful number, since it uses less digits than its factorization.

138227644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15924 (or 15922 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 138227644 is about 11757.0253040469. The cubic root of 138227644 is about 517.0489199432.

The spelling of 138227644 in words is "one hundred thirty-eight million, two hundred twenty-seven thousand, six hundred forty-four".