11572866 has 12 divisors (see below), whose sum is σ = 25074582. Its totient is φ = 3857616.

The previous prime is 11572861. The next prime is 11572867. The reversal of 11572866 is 66827511.

11572866 is a `hidden beast` number, since 1 + 1 + 572 + 86 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9790641 + 1782225 = 3129^2 + 1335^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11572866.

It is not an unprimeable number, because it can be changed into a prime (11572861) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 321451 + ... + 321486.

Almost surely, 2^11572866 is an apocalyptic number.

11572866 is an abundant number, since it is smaller than the sum of its proper divisors (13501716).

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

11572866 is a wasteful number, since it uses less digits than its factorization.

11572866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642945 (or 642942 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 11572866 is about 3401.8915326624. The cubic root of 11572866 is about 226.1935976536.

The spelling of 11572866 in words is "eleven million, five hundred seventy-two thousand, eight hundred sixty-six".