13228018 has 8 divisors (see below), whose sum is σ = 20378412. Its totient is φ = 6435216.

The previous prime is 13228003. The next prime is 13228021. The reversal of 13228018 is 81082231.

It can be written as a sum of positive squares in 2 ways, for example, as 12089529 + 1138489 = 3477^2 + 1067^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 13227983 and 13228001.

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, 89305 + ... + 89452.

Almost surely, 2^13228018 is an apocalyptic number.

13228018 is a deficient number, since it is larger than the sum of its proper divisors (7150394).

13228018 is a wasteful number, since it uses less digits than its factorization.

13228018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178796.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 13228018 is about 3637.0342313484. The cubic root of 13228018 is about 236.5002435980.

The spelling of 13228018 in words is "thirteen million, two hundred twenty-eight thousand, eighteen".