138764572 has 12 divisors (see below), whose sum is σ = 243990376. Its totient is φ = 69053040.

The previous prime is 138764567. The next prime is 138764573. The reversal of 138764572 is 275467831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138764573) 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, 81363 + ... + 83050.

Almost surely, 2^138764572 is an apocalyptic number.

It is an amenable number.

138764572 is a deficient number, since it is larger than the sum of its proper divisors (105225804).

138764572 is a wasteful number, since it uses less digits than its factorization.

138764572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164628 (or 164626 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 138764572 is about 11779.8375201019. The cubic root of 138764572 is about 517.7175256110.

The spelling of 138764572 in words is "one hundred thirty-eight million, seven hundred sixty-four thousand, five hundred seventy-two".