138052388 has 12 divisors (see below), whose sum is σ = 242123532. Its totient is φ = 68874240.

The previous prime is 138052381. The next prime is 138052391. The reversal of 138052388 is 883250831.

138052388 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 104203264 + 33849124 = 10208^2 + 5818^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (138052381) 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, 35933 + ... + 39588.

It is an arithmetic number, because the mean of its divisors is an integer number (20176961).

Almost surely, 2^138052388 is an apocalyptic number.

It is an amenable number.

138052388 is a deficient number, since it is larger than the sum of its proper divisors (104071144).

138052388 is a wasteful number, since it uses less digits than its factorization.

138052388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75982 (or 75980 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 138052388 is about 11749.5696942484. The cubic root of 138052388 is about 516.8303089462.

The spelling of 138052388 in words is "one hundred thirty-eight million, fifty-two thousand, three hundred eighty-eight".