138535712 has 24 divisors (see below), whose sum is σ = 311705856. Its totient is φ = 59372352.

The previous prime is 138535687. The next prime is 138535729. The reversal of 138535712 is 217535831.

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, 309008 + ... + 309455.

It is an arithmetic number, because the mean of its divisors is an integer number (12987744).

Almost surely, 2^138535712 is an apocalyptic number.

It is an amenable number.

138535712 is an abundant number, since it is smaller than the sum of its proper divisors (173170144).

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

138535712 is an equidigital number, since it uses as much as digits as its factorization.

138535712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618480 (or 618472 counting only the distinct ones).

The product of its digits is 25200, while the sum is 35.

The square root of 138535712 is about 11770.1194556385. The cubic root of 138535712 is about 517.4327506411.

The spelling of 138535712 in words is "one hundred thirty-eight million, five hundred thirty-five thousand, seven hundred twelve".