138734244 has 54 divisors (see below), whose sum is σ = 385480550. Its totient is φ = 42039360.

The previous prime is 138734203. The next prime is 138734249. The reversal of 138734244 is 442437831.

138734244 is a `hidden beast` number, since 1 + 387 + 34 + 244 = 666.

It can be written as a sum of positive squares in only one way, i.e., 118592100 + 20142144 = 10890^2 + 4488^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 138734199 and 138734208.

It is not an unprimeable number, because it can be changed into a prime (138734249) 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 17 ways as a sum of consecutive naturals, for example, 11569 + ... + 20280.

Almost surely, 2^138734244 is an apocalyptic number.

It is an amenable number.

138734244 is an abundant number, since it is smaller than the sum of its proper divisors (246746306).

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

138734244 is a wasteful number, since it uses less digits than its factorization.

138734244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31881 (or 31865 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 138734244 is about 11778.5501654491. The cubic root of 138734244 is about 517.6798058940.

The spelling of 138734244 in words is "one hundred thirty-eight million, seven hundred thirty-four thousand, two hundred forty-four".