138344444 has 36 divisors (see below), whose sum is σ = 290727360. Its totient is φ = 57375360.

The previous prime is 138344399. The next prime is 138344477. The reversal of 138344444 is 444443831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5309 + ... + 17460.

It is an arithmetic number, because the mean of its divisors is an integer number (8075760).

Almost surely, 2^138344444 is an apocalyptic number.

138344444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138344444 is an abundant number, since it is smaller than the sum of its proper divisors (152382916).

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

138344444 is a wasteful number, since it uses less digits than its factorization.

138344444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22818 (or 22809 counting only the distinct ones).

The product of its digits is 73728, while the sum is 35.

The square root of 138344444 is about 11761.9914980415. The cubic root of 138344444 is about 517.1945114477.

The spelling of 138344444 in words is "one hundred thirty-eight million, three hundred forty-four thousand, four hundred forty-four".