138789524 has 12 divisors (see below), whose sum is σ = 242980500. Its totient is φ = 69366528.

The previous prime is 138789523. The next prime is 138789557. The reversal of 138789524 is 425987831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55651600 + 83137924 = 7460^2 + 9118^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138789523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7202 + ... + 18150.

It is an arithmetic number, because the mean of its divisors is an integer number (20248375).

Almost surely, 2^138789524 is an apocalyptic number.

It is an amenable number.

138789524 is a deficient number, since it is larger than the sum of its proper divisors (104190976).

138789524 is a wasteful number, since it uses less digits than its factorization.

138789524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14122 (or 14120 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 138789524 is about 11780.8965702955. The cubic root of 138789524 is about 517.7485549371.

The spelling of 138789524 in words is "one hundred thirty-eight million, seven hundred eighty-nine thousand, five hundred twenty-four".