139994320 has 80 divisors (see below), whose sum is σ = 349263360. Its totient is φ = 51996672.

The previous prime is 139994297. The next prime is 139994381. The reversal of 139994320 is 23499931.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 106789 + ... + 108091.

It is an arithmetic number, because the mean of its divisors is an integer number (4365792).

Almost surely, 2^139994320 is an apocalyptic number.

139994320 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 139994320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174631680).

139994320 is an abundant number, since it is smaller than the sum of its proper divisors (209269040).

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

139994320 is a wasteful number, since it uses less digits than its factorization.

139994320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412 (or 1406 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 139994320 is about 11831.9195399563. The cubic root of 139994320 is about 519.2423878600.

The spelling of 139994320 in words is "one hundred thirty-nine million, nine hundred ninety-four thousand, three hundred twenty".