28566463 has 4 divisors (see below), whose sum is σ = 29263248. Its totient is φ = 27869680.

The previous prime is 28566457. The next prime is 28566487. The reversal of 28566463 is 36466582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36466582 = 2 ⋅18233291.

It is a cyclic number.

It is not a de Polignac number, because 28566463 - 2⁹ = 28565951 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566563) 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, 348331 + ... + 348412.

It is an arithmetic number, because the mean of its divisors is an integer number (7315812).

Almost surely, 2^28566463 is an apocalyptic number.

28566463 is a deficient number, since it is larger than the sum of its proper divisors (696785).

28566463 is an equidigital number, since it uses as much as digits as its factorization.

28566463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696784.

The product of its digits is 207360, while the sum is 40.

The square root of 28566463 is about 5344.7603313900. The cubic root of 28566463 is about 305.6929973759.

The spelling of 28566463 in words is "twenty-eight million, five hundred sixty-six thousand, four hundred sixty-three".