138437292 has 24 divisors (see below), whose sum is σ = 369166336. Its totient is φ = 39553488.

The previous prime is 138437203. The next prime is 138437297. The reversal of 138437292 is 292734831.

It is a self number, because there is not a number n which added to its sum of digits gives 138437292.

It is not an unprimeable number, because it can be changed into a prime (138437297) 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, 823948 + ... + 824115.

Almost surely, 2^138437292 is an apocalyptic number.

138437292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138437292 is an abundant number, since it is smaller than the sum of its proper divisors (230729044).

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

138437292 is a wasteful number, since it uses less digits than its factorization.

138437292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648077 (or 1648075 counting only the distinct ones).

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

The square root of 138437292 is about 11765.9377866790. The cubic root of 138437292 is about 517.3101882706.

The spelling of 138437292 in words is "one hundred thirty-eight million, four hundred thirty-seven thousand, two hundred ninety-two".