28630566 has 24 divisors (see below), whose sum is σ = 62289864. Its totient is φ = 9504000.

The previous prime is 28630543. The next prime is 28630573. The reversal of 28630566 is 66503682.

It is a self number, because there is not a number n which added to its sum of digits gives 28630566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1350 + ... + 7686.

It is an arithmetic number, because the mean of its divisors is an integer number (2595411).

Almost surely, 2^28630566 is an apocalyptic number.

28630566 is an abundant number, since it is smaller than the sum of its proper divisors (33659298).

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

28630566 is a wasteful number, since it uses less digits than its factorization.

28630566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6596 (or 6593 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 28630566 is about 5350.7537786746. The cubic root of 28630566 is about 305.9214844052.

The spelling of 28630566 in words is "twenty-eight million, six hundred thirty thousand, five hundred sixty-six".