138252735 has 12 divisors (see below), whose sum is σ = 239638152. Its totient is φ = 73734768.

The previous prime is 138252733. The next prime is 138252743. The reversal of 138252735 is 537252831.

It is a happy number.

138252735 is a `hidden beast` number, since 1 + 382 + 5 + 273 + 5 = 666.

It is not a de Polignac number, because 138252735 - 2¹ = 138252733 is a prime.

It is a super-2 number, since 2×138252735² = 38227637469960450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138252735.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138252733) 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, 1536097 + ... + 1536186.

It is an arithmetic number, because the mean of its divisors is an integer number (19969846).

Almost surely, 2^138252735 is an apocalyptic number.

138252735 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138252735 is a deficient number, since it is larger than the sum of its proper divisors (101385417).

138252735 is a wasteful number, since it uses less digits than its factorization.

138252735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3072294 (or 3072291 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 138252735 is about 11758.0923197600. The cubic root of 138252735 is about 517.0802028549.

The spelling of 138252735 in words is "one hundred thirty-eight million, two hundred fifty-two thousand, seven hundred thirty-five".