138437826 has 16 divisors (see below), whose sum is σ = 276998400. Its totient is φ = 46125488.

The previous prime is 138437813. The next prime is 138437833. The reversal of 138437826 is 628734831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16720 + ... + 23588.

It is an arithmetic number, because the mean of its divisors is an integer number (17312400).

Almost surely, 2^138437826 is an apocalyptic number.

138437826 is an abundant number, since it is smaller than the sum of its proper divisors (138560574).

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

138437826 is a wasteful number, since it uses less digits than its factorization.

138437826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10233.

The product of its digits is 193536, while the sum is 42.

The square root of 138437826 is about 11765.9604792809. The cubic root of 138437826 is about 517.3108534172.

The spelling of 138437826 in words is "one hundred thirty-eight million, four hundred thirty-seven thousand, eight hundred twenty-six".