138505374 has 24 divisors (see below), whose sum is σ = 342966000. Its totient is φ = 39572928.

The previous prime is 138505361. The next prime is 138505387. The reversal of 138505374 is 473505831.

It is an interprime number because it is at equal distance from previous prime (138505361) and next prime (138505387).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 549499 + ... + 549750.

It is an arithmetic number, because the mean of its divisors is an integer number (14290250).

Almost surely, 2^138505374 is an apocalyptic number.

138505374 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

138505374 is an abundant number, since it is smaller than the sum of its proper divisors (204460626).

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

138505374 is a wasteful number, since it uses less digits than its factorization.

138505374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099264 (or 1099261 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 138505374 is about 11768.8306131068. The cubic root of 138505374 is about 517.3949769374.

The spelling of 138505374 in words is "one hundred thirty-eight million, five hundred five thousand, three hundred seventy-four".