13434728 has 16 divisors (see below), whose sum is σ = 25474500. Its totient is φ = 6641536.

The previous prime is 13434721. The next prime is 13434739. The reversal of 13434728 is 82743431.

It can be written as a sum of positive squares in 2 ways, for example, as 13118884 + 315844 = 3622^2 + 562^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13434694 and 13434703.

It is not an unprimeable number, because it can be changed into a prime (13434721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8723 + ... + 10146.

Almost surely, 2^13434728 is an apocalyptic number.

It is an amenable number.

13434728 is a deficient number, since it is larger than the sum of its proper divisors (12039772).

13434728 is a wasteful number, since it uses less digits than its factorization.

13434728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18964 (or 18960 counting only the distinct ones).

The product of its digits is 16128, while the sum is 32.

The square root of 13434728 is about 3665.3414574907. The cubic root of 13434728 is about 237.7257863895.

The spelling of 13434728 in words is "thirteen million, four hundred thirty-four thousand, seven hundred twenty-eight".