138982720 has 56 divisors (see below), whose sum is σ = 348386400. Its totient is φ = 52664832.

The previous prime is 138982709. The next prime is 138982757. The reversal of 138982720 is 27289831.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5350 + ... + 17509.

Almost surely, 2^138982720 is an apocalyptic number.

138982720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138982720 is an abundant number, since it is smaller than the sum of its proper divisors (209403680).

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

138982720 is a wasteful number, since it uses less digits than its factorization.

138982720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22895 (or 22885 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 138982720 is about 11789.0932645391. The cubic root of 138982720 is about 517.9886801042.

The spelling of 138982720 in words is "one hundred thirty-eight million, nine hundred eighty-two thousand, seven hundred twenty".