13228605 has 24 divisors (see below), whose sum is σ = 24694488. Its totient is φ = 6512256.

The previous prime is 13228603. The next prime is 13228619. The reversal of 13228605 is 50682231.

13228605 is a `hidden beast` number, since 1 + 32 + 28 + 605 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 116964 + 13111641 = 342^2 + 3621^2 .

It is not a de Polignac number, because 13228605 - 2¹ = 13228603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13228603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10722 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (1028937).

Almost surely, 2^13228605 is an apocalyptic number.

13228605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13228605 is a deficient number, since it is larger than the sum of its proper divisors (11465883).

13228605 is a wasteful number, since it uses less digits than its factorization.

13228605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22637 (or 22634 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 13228605 is about 3637.1149280714. The cubic root of 13228605 is about 236.5037418190.

The spelling of 13228605 in words is "thirteen million, two hundred twenty-eight thousand, six hundred five".