138841860 has 48 divisors (see below), whose sum is σ = 389321856. Its totient is φ = 36970752.

The previous prime is 138841853. The next prime is 138841891. The reversal of 138841860 is 68148831.

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, 56824 + ... + 59216.

It is an arithmetic number, because the mean of its divisors is an integer number (8110872).

Almost surely, 2^138841860 is an apocalyptic number.

138841860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138841860 is an abundant number, since it is smaller than the sum of its proper divisors (250479996).

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

138841860 is a wasteful number, since it uses less digits than its factorization.

138841860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372 (or 3370 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The square root of 138841860 is about 11783.1175840692. The cubic root of 138841860 is about 517.8136258501.

The spelling of 138841860 in words is "one hundred thirty-eight million, eight hundred forty-one thousand, eight hundred sixty".