138751788 has 48 divisors (see below), whose sum is σ = 370782720. Its totient is φ = 39560064.

The previous prime is 138751741. The next prime is 138751817. The reversal of 138751788 is 887157831.

It is a happy number.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46345 + ... + 49247.

It is an arithmetic number, because the mean of its divisors is an integer number (7724640).

Almost surely, 2^138751788 is an apocalyptic number.

It is an amenable number.

138751788 is an abundant number, since it is smaller than the sum of its proper divisors (232030932).

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

138751788 is a wasteful number, since it uses less digits than its factorization.

138751788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486 (or 3484 counting only the distinct ones).

The product of its digits is 376320, while the sum is 48.

The square root of 138751788 is about 11779.2948855184. The cubic root of 138751788 is about 517.7016264901.

The spelling of 138751788 in words is "one hundred thirty-eight million, seven hundred fifty-one thousand, seven hundred eighty-eight".