138970880 has 36 divisors (see below), whose sum is σ = 332881752. Its totient is φ = 55587840.

The previous prime is 138970877. The next prime is 138970889. The reversal of 138970880 is 88079831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138970889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53006 + ... + 55565.

Almost surely, 2^138970880 is an apocalyptic number.

138970880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138970880 is an abundant number, since it is smaller than the sum of its proper divisors (193910872).

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

138970880 is an equidigital number, since it uses as much as digits as its factorization.

138970880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108592 (or 108578 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 44.

The square root of 138970880 is about 11788.5910947831. The cubic root of 138970880 is about 517.9739704575.

The spelling of 138970880 in words is "one hundred thirty-eight million, nine hundred seventy thousand, eight hundred eighty".