138427392 has 44 divisors (see below), whose sum is σ = 368967656. Its totient is φ = 46141440.

The previous prime is 138427391. The next prime is 138427417. The reversal of 138427392 is 293724831.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138427392.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138427391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19459 + ... + 25602.

Almost surely, 2^138427392 is an apocalyptic number.

138427392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138427392 is an abundant number, since it is smaller than the sum of its proper divisors (230540264).

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

138427392 is an equidigital number, since it uses as much as digits as its factorization.

138427392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45084 (or 45066 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 138427392 is about 11765.5170732102. The cubic root of 138427392 is about 517.2978565911.

The spelling of 138427392 in words is "one hundred thirty-eight million, four hundred twenty-seven thousand, three hundred ninety-two".