13228947 has 8 divisors (see below), whose sum is σ = 19598480. Its totient is φ = 8819280.

The previous prime is 13228913. The next prime is 13228951. The reversal of 13228947 is 74982231.

13228947 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 13228947 - 2⁷ = 13228819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13228967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244954 + ... + 245007.

It is an arithmetic number, because the mean of its divisors is an integer number (2449810).

Almost surely, 2^13228947 is an apocalyptic number.

13228947 is a deficient number, since it is larger than the sum of its proper divisors (6369533).

13228947 is an equidigital number, since it uses as much as digits as its factorization.

13228947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489970 (or 489964 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 13228947 is about 3637.1619430540. The cubic root of 13228947 is about 236.5057799171.

The spelling of 13228947 in words is "thirteen million, two hundred twenty-eight thousand, nine hundred forty-seven".