138967984 has 20 divisors (see below), whose sum is σ = 270384480. Its totient is φ = 69191360.

The previous prime is 138967973. The next prime is 138967991. The reversal of 138967984 is 489769831.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14347 + ... + 21994.

It is an arithmetic number, because the mean of its divisors is an integer number (13519224).

Almost surely, 2^138967984 is an apocalyptic number.

It is an amenable number.

138967984 is a deficient number, since it is larger than the sum of its proper divisors (131416496).

138967984 is a wasteful number, since it uses less digits than its factorization.

138967984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36588 (or 36582 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 138967984 is about 11788.4682635192. The cubic root of 138967984 is about 517.9703724303.

The spelling of 138967984 in words is "one hundred thirty-eight million, nine hundred sixty-seven thousand, nine hundred eighty-four".