138437340 has 24 divisors (see below), whose sum is σ = 387624720. Its totient is φ = 36916608.

The previous prime is 138437323. The next prime is 138437357. The reversal of 138437340 is 43734831.

138437340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (138437323) and next prime (138437357).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1153585 + ... + 1153704.

It is an arithmetic number, because the mean of its divisors is an integer number (16151030).

Almost surely, 2^138437340 is an apocalyptic number.

138437340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138437340 is an abundant number, since it is smaller than the sum of its proper divisors (249187380).

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

138437340 is a wasteful number, since it uses less digits than its factorization.

138437340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307301 (or 2307299 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 138437340 is about 11765.9398264652. The cubic root of 138437340 is about 517.3102480591.

The spelling of 138437340 in words is "one hundred thirty-eight million, four hundred thirty-seven thousand, three hundred forty".