138540792 has 48 divisors (see below), whose sum is σ = 375054840. Its totient is φ = 42626688.

The previous prime is 138540751. The next prime is 138540793. The reversal of 138540792 is 297045831.

138540792 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 138540792.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138540793) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13023 + ... + 21134.

Almost surely, 2^138540792 is an apocalyptic number.

138540792 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138540792 is an abundant number, since it is smaller than the sum of its proper divisors (236514048).

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

138540792 is a wasteful number, since it uses less digits than its factorization.

138540792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34192 (or 34175 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 138540792 is about 11770.3352543587. The cubic root of 138540792 is about 517.4390751866.

The spelling of 138540792 in words is "one hundred thirty-eight million, five hundred forty thousand, seven hundred ninety-two".