13057866 has 12 divisors (see below), whose sum is σ = 28292082. Its totient is φ = 4352616.

The previous prime is 13057841. The next prime is 13057909. The reversal of 13057866 is 66875031.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 1010025 = 3471^2 + 1005^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13057866.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 362701 + ... + 362736.

Almost surely, 2^13057866 is an apocalyptic number.

13057866 is an abundant number, since it is smaller than the sum of its proper divisors (15234216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13057866 is a wasteful number, since it uses less digits than its factorization.

13057866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725445 (or 725442 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 13057866 is about 3613.5669358682. The cubic root of 13057866 is about 235.4818301802.

The spelling of 13057866 in words is "thirteen million, fifty-seven thousand, eight hundred sixty-six".