138384252 has 36 divisors (see below), whose sum is σ = 352135056. Its totient is φ = 45820800.

The previous prime is 138384251. The next prime is 138384269. The reversal of 138384252 is 252483831.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138384251) 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, 7293 + ... + 18164.

Almost surely, 2^138384252 is an apocalyptic number.

138384252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138384252 is an abundant number, since it is smaller than the sum of its proper divisors (213750804).

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

138384252 is a wasteful number, since it uses less digits than its factorization.

138384252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25618 (or 25613 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 138384252 is about 11763.6836067620. The cubic root of 138384252 is about 517.2441134991.

The spelling of 138384252 in words is "one hundred thirty-eight million, three hundred eighty-four thousand, two hundred fifty-two".