138417944 has 48 divisors (see below), whose sum is σ = 319681080. Its totient is φ = 55829760.

The previous prime is 138417941. The next prime is 138417947. The reversal of 138417944 is 449714831.

It is an interprime number because it is at equal distance from previous prime (138417941) and next prime (138417947).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138417941) 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, 3722 + ... + 17049.

Almost surely, 2^138417944 is an apocalyptic number.

138417944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138417944 is an abundant number, since it is smaller than the sum of its proper divisors (181263136).

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

138417944 is a wasteful number, since it uses less digits than its factorization.

138417944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20808 (or 20797 counting only the distinct ones).

The product of its digits is 96768, while the sum is 41.

The square root of 138417944 is about 11765.1155540437. The cubic root of 138417944 is about 517.2860873854.

The spelling of 138417944 in words is "one hundred thirty-eight million, four hundred seventeen thousand, nine hundred forty-four".