13228847 has 4 divisors (see below), whose sum is σ = 13655616. Its totient is φ = 12802080.

The previous prime is 13228837. The next prime is 13228861. The reversal of 13228847 is 74882231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74882231 = 2657 ⋅28183.

It is a cyclic number.

It is not a de Polignac number, because 13228847 - 2⁶ = 13228783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13228837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213338 + ... + 213399.

It is an arithmetic number, because the mean of its divisors is an integer number (3413904).

Almost surely, 2^13228847 is an apocalyptic number.

13228847 is a deficient number, since it is larger than the sum of its proper divisors (426769).

13228847 is an equidigital number, since it uses as much as digits as its factorization.

13228847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426768.

The product of its digits is 21504, while the sum is 35.

The square root of 13228847 is about 3637.1481960459. The cubic root of 13228847 is about 236.5051839856.

The spelling of 13228847 in words is "thirteen million, two hundred twenty-eight thousand, eight hundred forty-seven".