138183738 has 32 divisors (see below), whose sum is σ = 344563200. Its totient is φ = 35891760.

The previous prime is 138183737. The next prime is 138183743. The reversal of 138183738 is 837381831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 138183738.

It is not an unprimeable number, because it can be changed into a prime (138183737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149088 + ... + 150011.

It is an arithmetic number, because the mean of its divisors is an integer number (10767600).

Almost surely, 2^138183738 is an apocalyptic number.

138183738 is an abundant number, since it is smaller than the sum of its proper divisors (206379462).

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

138183738 is a wasteful number, since it uses less digits than its factorization.

138183738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299122.

The product of its digits is 96768, while the sum is 42.

The square root of 138183738 is about 11755.1579317336. The cubic root of 138183738 is about 516.9941697904.

The spelling of 138183738 in words is "one hundred thirty-eight million, one hundred eighty-three thousand, seven hundred thirty-eight".