13889028 has 48 divisors (see below), whose sum is σ = 33929280. Its totient is φ = 4416384.

The previous prime is 13889027. The next prime is 13889039. The reversal of 13889028 is 82098831.

13889028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13889027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37050 + ... + 37422.

It is an arithmetic number, because the mean of its divisors is an integer number (706860).

Almost surely, 2^13889028 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 13889028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16964640).

13889028 is an abundant number, since it is smaller than the sum of its proper divisors (20040252).

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

13889028 is a wasteful number, since it uses less digits than its factorization.

13889028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 514 counting only the distinct ones).

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

The square root of 13889028 is about 3726.7986261670. The cubic root of 13889028 is about 240.3757309136.

The spelling of 13889028 in words is "thirteen million, eight hundred eighty-nine thousand, twenty-eight".