139988304 has 160 divisors (see below), whose sum is σ = 427234560. Its totient is φ = 43794432.

The previous prime is 139988287. The next prime is 139988339. The reversal of 139988304 is 403889931.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 139988304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 725232 + ... + 725424.

It is an arithmetic number, because the mean of its divisors is an integer number (2670216).

Almost surely, 2^139988304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139988304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213617280).

139988304 is an abundant number, since it is smaller than the sum of its proper divisors (287246256).

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

139988304 is a wasteful number, since it uses less digits than its factorization.

139988304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 139988304 is about 11831.6653096680. The cubic root of 139988304 is about 519.2349499227.

The spelling of 139988304 in words is "one hundred thirty-nine million, nine hundred eighty-eight thousand, three hundred four".