138814992 has 40 divisors (see below), whose sum is σ = 398451680. Its totient is φ = 46271520.

The previous prime is 138814987. The next prime is 138814997. The reversal of 138814992 is 299418831.

It is an interprime number because it is at equal distance from previous prime (138814987) and next prime (138814997).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (138814997) 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, 160234 + ... + 161097.

It is an arithmetic number, because the mean of its divisors is an integer number (9961292).

Almost surely, 2^138814992 is an apocalyptic number.

138814992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138814992 is an abundant number, since it is smaller than the sum of its proper divisors (259636688).

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

138814992 is a wasteful number, since it uses less digits than its factorization.

138814992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321348 (or 321336 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 138814992 is about 11781.9774231663. The cubic root of 138814992 is about 517.7802221056.

The spelling of 138814992 in words is "one hundred thirty-eight million, eight hundred fourteen thousand, nine hundred ninety-two".