138886680 has 64 divisors (see below), whose sum is σ = 426837600. Its totient is φ = 36131840.

The previous prime is 138886679. The next prime is 138886681. The reversal of 138886680 is 86688831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (138886679) and next prime (138886681).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138886681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9195 + ... + 19034.

Almost surely, 2^138886680 is an apocalyptic number.

138886680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138886680 is an abundant number, since it is smaller than the sum of its proper divisors (287950920).

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

138886680 is a wasteful number, since it uses less digits than its factorization.

138886680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28284 (or 28280 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 138886680 is about 11785.0193041844. The cubic root of 138886680 is about 517.8693388985.

The spelling of 138886680 in words is "one hundred thirty-eight million, eight hundred eighty-six thousand, six hundred eighty".