13228388 has 12 divisors (see below), whose sum is σ = 23775612. Its totient is φ = 6435360.

The previous prime is 13228367. The next prime is 13228409. The reversal of 13228388 is 88382231.

It is a happy number.

13228388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13228367) and next prime (13228409).

It can be written as a sum of positive squares in 2 ways, for example, as 5654884 + 7573504 = 2378^2 + 2752^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44543 + ... + 44838.

It is an arithmetic number, because the mean of its divisors is an integer number (1981301).

Almost surely, 2^13228388 is an apocalyptic number.

It is an amenable number.

13228388 is a deficient number, since it is larger than the sum of its proper divisors (10547224).

13228388 is a wasteful number, since it uses less digits than its factorization.

13228388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89422 (or 89420 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 13228388 is about 3637.0850966124. The cubic root of 13228388 is about 236.5024486216.

The spelling of 13228388 in words is "thirteen million, two hundred twenty-eight thousand, three hundred eighty-eight".