13899028 has 54 divisors (see below), whose sum is σ = 29417738. Its totient is φ = 5707680.

The previous prime is 13899001. The next prime is 13899049. The reversal of 13899028 is 82099831.

It can be written as a sum of positive squares in only one way, i.e., 9622404 + 4276624 = 3102^2 + 2068^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 295701 + ... + 295747.

Almost surely, 2^13899028 is an apocalyptic number.

It is an amenable number.

13899028 is an abundant number, since it is smaller than the sum of its proper divisors (15518710).

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

13899028 is a wasteful number, since it uses less digits than its factorization.

13899028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 13899028 is about 3728.1400188298. The cubic root of 13899028 is about 240.4334066714.

The spelling of 13899028 in words is "thirteen million, eight hundred ninety-nine thousand, twenty-eight".