13228769 has 8 divisors (see below), whose sum is σ = 14028000. Its totient is φ = 12439872.

The previous prime is 13228759. The next prime is 13228777. The reversal of 13228769 is 96782231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13228769 is a prime.

It is a super-2 number, since 2×13228769² = 350000658510722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13228759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137 + ... + 5145.

It is an arithmetic number, because the mean of its divisors is an integer number (1753500).

Almost surely, 2^13228769 is an apocalyptic number.

13228769 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13228769 is a deficient number, since it is larger than the sum of its proper divisors (799231).

13228769 is a wasteful number, since it uses less digits than its factorization.

13228769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5167.

The product of its digits is 36288, while the sum is 38.

The square root of 13228769 is about 3637.1374733436. The cubic root of 13228769 is about 236.5047191570.

The spelling of 13228769 in words is "thirteen million, two hundred twenty-eight thousand, seven hundred sixty-nine".