138502860 has 48 divisors (see below), whose sum is σ = 388717056. Its totient is φ = 36847552.

The previous prime is 138502853. The next prime is 138502873. The reversal of 138502860 is 68205831.

It is a happy number.

138502860 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25549 + ... + 30491.

It is an arithmetic number, because the mean of its divisors is an integer number (8098272).

Almost surely, 2^138502860 is an apocalyptic number.

138502860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138502860 is an abundant number, since it is smaller than the sum of its proper divisors (250214196).

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

138502860 is a wasteful number, since it uses less digits than its factorization.

138502860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5422 (or 5420 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 138502860 is about 11768.7238050691. The cubic root of 138502860 is about 517.3918465201.

The spelling of 138502860 in words is "one hundred thirty-eight million, five hundred two thousand, eight hundred sixty".