138744572 has 6 divisors (see below), whose sum is σ = 242803008. Its totient is φ = 69372284.

The previous prime is 138744569. The next prime is 138744587. The reversal of 138744572 is 275447831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17343068 + ... + 17343075.

It is an arithmetic number, because the mean of its divisors is an integer number (40467168).

Almost surely, 2^138744572 is an apocalyptic number.

It is an amenable number.

138744572 is a deficient number, since it is larger than the sum of its proper divisors (104058436).

138744572 is a wasteful number, since it uses less digits than its factorization.

138744572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34686147 (or 34686145 counting only the distinct ones).

The product of its digits is 188160, while the sum is 41.

The square root of 138744572 is about 11778.9885813681. The cubic root of 138744572 is about 517.6926517116.

The spelling of 138744572 in words is "one hundred thirty-eight million, seven hundred forty-four thousand, five hundred seventy-two".