138860722 has 64 divisors (see below), whose sum is σ = 282240000. Its totient is φ = 49481280.

The previous prime is 138860707. The next prime is 138860767. The reversal of 138860722 is 227068831.

It is a super-2 number, since 2×138860722² = 38564600228722568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 278029 + ... + 278527.

It is an arithmetic number, because the mean of its divisors is an integer number (4410000).

Almost surely, 2^138860722 is an apocalyptic number.

138860722 is an abundant number, since it is smaller than the sum of its proper divisors (143379278).

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

138860722 is a wasteful number, since it uses less digits than its factorization.

138860722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 138860722 is about 11783.9179392934. The cubic root of 138860722 is about 517.8370735297.

The spelling of 138860722 in words is "one hundred thirty-eight million, eight hundred sixty thousand, seven hundred twenty-two".