138807562 has 8 divisors (see below), whose sum is σ = 208278756. Its totient is φ = 69381312.

The previous prime is 138807551. The next prime is 138807587. The reversal of 138807562 is 265708831.

It can be written as a sum of positive squares in 2 ways, for example, as 136212241 + 2595321 = 11671^2 + 1611^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 1993 + ... + 16780.

Almost surely, 2^138807562 is an apocalyptic number.

138807562 is a deficient number, since it is larger than the sum of its proper divisors (69471194).

138807562 is a wasteful number, since it uses less digits than its factorization.

138807562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22472.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 138807562 is about 11781.6621068506. The cubic root of 138807562 is about 517.7709839687.

The spelling of 138807562 in words is "one hundred thirty-eight million, eight hundred seven thousand, five hundred sixty-two".