13428724 has 6 divisors (see below), whose sum is σ = 23500274. Its totient is φ = 6714360.

The previous prime is 13428721. The next prime is 13428731. The reversal of 13428724 is 42782431.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 33124 = 3660^2 + 182^2 .

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13428721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1678587 + ... + 1678594.

Almost surely, 2^13428724 is an apocalyptic number.

It is an amenable number.

13428724 is a deficient number, since it is larger than the sum of its proper divisors (10071550).

13428724 is a wasteful number, since it uses less digits than its factorization.

13428724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3357185 (or 3357183 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 13428724 is about 3664.5223426799. The cubic root of 13428724 is about 237.6903677765.

The spelling of 13428724 in words is "thirteen million, four hundred twenty-eight thousand, seven hundred twenty-four".