28566506 has 32 divisors (see below), whose sum is σ = 46545408. Its totient is φ = 13115520.

The previous prime is 28566497. The next prime is 28566541. The reversal of 28566506 is 60566582.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28566506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157736 + ... + 157916.

It is an arithmetic number, because the mean of its divisors is an integer number (1454544).

Almost surely, 2^28566506 is an apocalyptic number.

28566506 is a deficient number, since it is larger than the sum of its proper divisors (17978902).

28566506 is a wasteful number, since it uses less digits than its factorization.

28566506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 28566506 is about 5344.7643540197. The cubic root of 28566506 is about 305.6931507585.

The spelling of 28566506 in words is "twenty-eight million, five hundred sixty-six thousand, five hundred six".