138289260 has 48 divisors (see below), whose sum is σ = 388507392. Its totient is φ = 36753600.

The previous prime is 138289259. The next prime is 138289289. The reversal of 138289260 is 62982831.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14955 + ... + 22365.

It is an arithmetic number, because the mean of its divisors is an integer number (8093904).

Almost surely, 2^138289260 is an apocalyptic number.

138289260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138289260 is an abundant number, since it is smaller than the sum of its proper divisors (250218132).

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

138289260 is a wasteful number, since it uses less digits than its factorization.

138289260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7734 (or 7732 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 138289260 is about 11759.6454028172. The cubic root of 138289260 is about 517.1257346641.

The spelling of 138289260 in words is "one hundred thirty-eight million, two hundred eighty-nine thousand, two hundred sixty".