138791370 has 16 divisors (see below), whose sum is σ = 333099360. Its totient is φ = 37011024.

The previous prime is 138791353. The next prime is 138791381. The reversal of 138791370 is 73197831.

It is a happy number.

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, 2313160 + ... + 2313219.

It is an arithmetic number, because the mean of its divisors is an integer number (20818710).

Almost surely, 2^138791370 is an apocalyptic number.

138791370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138791370 is an abundant number, since it is smaller than the sum of its proper divisors (194307990).

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

138791370 is a wasteful number, since it uses less digits than its factorization.

138791370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4626389.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 138791370 is about 11780.9749172129. The cubic root of 138791370 is about 517.7508504024.

The spelling of 138791370 in words is "one hundred thirty-eight million, seven hundred ninety-one thousand, three hundred seventy".