138982986 has 32 divisors (see below), whose sum is σ = 325108800. Its totient is φ = 43889040.

The previous prime is 138982931. The next prime is 138982999. The reversal of 138982986 is 689289831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 66705 + ... + 68756.

It is an arithmetic number, because the mean of its divisors is an integer number (10159650).

Almost surely, 2^138982986 is an apocalyptic number.

138982986 is an abundant number, since it is smaller than the sum of its proper divisors (186125814).

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

138982986 is a wasteful number, since it uses less digits than its factorization.

138982986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135491 (or 135485 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 54.

The square root of 138982986 is about 11789.1045461477. The cubic root of 138982986 is about 517.9890105648.

The spelling of 138982986 in words is "one hundred thirty-eight million, nine hundred eighty-two thousand, nine hundred eighty-six".