13228564 has 6 divisors (see below), whose sum is σ = 23149994. Its totient is φ = 6614280.

The previous prime is 13228531. The next prime is 13228577. The reversal of 13228564 is 46582231.

It can be written as a sum of positive squares in only one way, i.e., 12816400 + 412164 = 3580^2 + 642^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1653567 + ... + 1653574.

Almost surely, 2^13228564 is an apocalyptic number.

It is an amenable number.

13228564 is a deficient number, since it is larger than the sum of its proper divisors (9921430).

13228564 is a wasteful number, since it uses less digits than its factorization.

13228564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3307145 (or 3307143 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 13228564 is about 3637.1092917316. The cubic root of 13228564 is about 236.5034974832.

The spelling of 13228564 in words is "thirteen million, two hundred twenty-eight thousand, five hundred sixty-four".