138361236 has 48 divisors (see below), whose sum is σ = 348434688. Its totient is φ = 42480000.

The previous prime is 138361199. The next prime is 138361243. The reversal of 138361236 is 632163831.

138361236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 138361197 and 138361206.

It is a congruent number.

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, 116566 + ... + 117746.

It is an arithmetic number, because the mean of its divisors is an integer number (7259056).

Almost surely, 2^138361236 is an apocalyptic number.

It is an amenable number.

138361236 is an abundant number, since it is smaller than the sum of its proper divisors (210073452).

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

138361236 is a wasteful number, since it uses less digits than its factorization.

138361236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952 (or 1950 counting only the distinct ones).

The product of its digits is 15552, while the sum is 33.

The square root of 138361236 is about 11762.7053010776. The cubic root of 138361236 is about 517.2154359812.

The spelling of 138361236 in words is "one hundred thirty-eight million, three hundred sixty-one thousand, two hundred thirty-six".