28800666 has 12 divisors (see below), whose sum is σ = 62401482. Its totient is φ = 9600216.

The previous prime is 28800659. The next prime is 28800671. The reversal of 28800666 is 66600882.

It can be written as a sum of positive squares in only one way, i.e., 26224641 + 2576025 = 5121^2 + 1605^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28800666.

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, 800001 + ... + 800036.

Almost surely, 2^28800666 is an apocalyptic number.

28800666 is an abundant number, since it is smaller than the sum of its proper divisors (33600816).

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

28800666 is a wasteful number, since it uses less digits than its factorization.

28800666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600045 (or 1600042 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28800666 is about 5366.6251965271. The cubic root of 28800666 is about 306.5261357266.

The spelling of 28800666 in words is "twenty-eight million, eight hundred thousand, six hundred sixty-six".