13889280 has 72 divisors (see below), whose sum is σ = 44371152. Its totient is φ = 3702784.

The previous prime is 13889279. The next prime is 13889321. The reversal of 13889280 is 8298831.

13889280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 2032 + ... + 5648.

It is an arithmetic number, because the mean of its divisors is an integer number (616266).

Almost surely, 2^13889280 is an apocalyptic number.

13889280 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 13889280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22185576).

13889280 is an abundant number, since it is smaller than the sum of its proper divisors (30481872).

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

13889280 is an equidigital number, since it uses as much as digits as its factorization.

13889280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3641 (or 3627 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 13889280 is about 3726.8324351921. The cubic root of 13889280 is about 240.3771846827.

The spelling of 13889280 in words is "thirteen million, eight hundred eighty-nine thousand, two hundred eighty".