28585666 has 8 divisors (see below), whose sum is σ = 43025724. Its totient is φ = 14243760.

The previous prime is 28585663. The next prime is 28585679. The reversal of 28585666 is 66658582.

It can be written as a sum of positive squares in 2 ways, for example, as 28569025 + 16641 = 5345^2 + 129^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (28585663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23805 + ... + 24976.

Almost surely, 2^28585666 is an apocalyptic number.

28585666 is a deficient number, since it is larger than the sum of its proper divisors (14440058).

28585666 is a wasteful number, since it uses less digits than its factorization.

28585666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49076.

The product of its digits is 691200, while the sum is 46.

The square root of 28585666 is about 5346.5564618734. The cubic root of 28585666 is about 305.7614798683.

The spelling of 28585666 in words is "twenty-eight million, five hundred eighty-five thousand, six hundred sixty-six".