138022536 has 32 divisors (see below), whose sum is σ = 363218400. Its totient is φ = 43585920.

The previous prime is 138022501. The next prime is 138022537. The reversal of 138022536 is 635220831.

138022536 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (138022537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150885 + ... + 151796.

It is an arithmetic number, because the mean of its divisors is an integer number (11350575).

Almost surely, 2^138022536 is an apocalyptic number.

It is an amenable number.

138022536 is an abundant number, since it is smaller than the sum of its proper divisors (225195864).

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

138022536 is a wasteful number, since it uses less digits than its factorization.

138022536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302709 (or 302705 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 138022536 is about 11748.2992811726. The cubic root of 138022536 is about 516.7930536916.

The spelling of 138022536 in words is "one hundred thirty-eight million, twenty-two thousand, five hundred thirty-six".