13288724 has 6 divisors (see below), whose sum is σ = 23255274. Its totient is φ = 6644360.

The previous prime is 13288721. The next prime is 13288727. The reversal of 13288724 is 42788231.

It is an interprime number because it is at equal distance from previous prime (13288721) and next prime (13288727).

It can be written as a sum of positive squares in only one way, i.e., 9610000 + 3678724 = 3100^2 + 1918^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13288721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1661087 + ... + 1661094.

It is an arithmetic number, because the mean of its divisors is an integer number (3875879).

Almost surely, 2^13288724 is an apocalyptic number.

It is an amenable number.

13288724 is a deficient number, since it is larger than the sum of its proper divisors (9966550).

13288724 is a wasteful number, since it uses less digits than its factorization.

13288724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3322185 (or 3322183 counting only the distinct ones).

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

The square root of 13288724 is about 3645.3702143952. The cubic root of 13288724 is about 236.8614737602.

The spelling of 13288724 in words is "thirteen million, two hundred eighty-eight thousand, seven hundred twenty-four".