138994080 has 96 divisors (see below), whose sum is σ = 452003328. Its totient is φ = 35865600.

The previous prime is 138994061. The next prime is 138994109. The reversal of 138994080 is 80499831.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10210 + ... + 19550.

It is an arithmetic number, because the mean of its divisors is an integer number (4708368).

Almost surely, 2^138994080 is an apocalyptic number.

138994080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138994080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226001664).

138994080 is an abundant number, since it is smaller than the sum of its proper divisors (313009248).

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

138994080 is a wasteful number, since it uses less digits than its factorization.

138994080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9390 (or 9382 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 138994080 is about 11789.5750559552. The cubic root of 138994080 is about 518.0027926287.

The spelling of 138994080 in words is "one hundred thirty-eight million, nine hundred ninety-four thousand, eighty".