138505092 has 24 divisors (see below), whose sum is σ = 352558752. Its totient is φ = 41971200.

The previous prime is 138504983. The next prime is 138505109. The reversal of 138505092 is 290505831.

138505092 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

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, 524509 + ... + 524772.

It is an arithmetic number, because the mean of its divisors is an integer number (14689948).

Almost surely, 2^138505092 is an apocalyptic number.

138505092 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138505092 is an abundant number, since it is smaller than the sum of its proper divisors (214053660).

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

138505092 is a wasteful number, since it uses less digits than its factorization.

138505092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049299 (or 1049297 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 138505092 is about 11768.8186323012. The cubic root of 138505092 is about 517.3946257946.

The spelling of 138505092 in words is "one hundred thirty-eight million, five hundred five thousand, ninety-two".