138238844 has 24 divisors (see below), whose sum is σ = 247759680. Its totient is φ = 67458816.

The previous prime is 138238843. The next prime is 138238873. The reversal of 138238844 is 448832831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138238843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85112 + ... + 86720.

It is an arithmetic number, because the mean of its divisors is an integer number (10323320).

Almost surely, 2^138238844 is an apocalyptic number.

It is an amenable number.

138238844 is a deficient number, since it is larger than the sum of its proper divisors (109520836).

138238844 is a wasteful number, since it uses less digits than its factorization.

138238844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2115 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 138238844 is about 11757.5016053582. The cubic root of 138238844 is about 517.0628843267.

The spelling of 138238844 in words is "one hundred thirty-eight million, two hundred thirty-eight thousand, eight hundred forty-four".