13028665 has 16 divisors (see below), whose sum is σ = 16930368. Its totient is φ = 9567936.

The previous prime is 13028651. The next prime is 13028671. The reversal of 13028665 is 56682031.

It is a cyclic number.

It is not a de Polignac number, because 13028665 - 2¹¹ = 13026617 is a prime.

It is a super-2 number, since 2×13028665² = 339492223364450, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14314 + ... + 15196.

It is an arithmetic number, because the mean of its divisors is an integer number (1058148).

Almost surely, 2^13028665 is an apocalyptic number.

It is an amenable number.

13028665 is a deficient number, since it is larger than the sum of its proper divisors (3901703).

13028665 is a wasteful number, since it uses less digits than its factorization.

13028665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 13028665 is about 3609.5242068727. The cubic root of 13028665 is about 235.3061650020.

The spelling of 13028665 in words is "thirteen million, twenty-eight thousand, six hundred sixty-five".