28566477 has 12 divisors (see below), whose sum is σ = 43690140. Its totient is φ = 17923968.

The previous prime is 28566457. The next prime is 28566487. The reversal of 28566477 is 77466582.

It can be written as a sum of positive squares in 2 ways, for example, as 23677956 + 4888521 = 4866^2 + 2211^2 .

It is not a de Polignac number, because 28566477 - 2¹² = 28562381 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93202 + ... + 93507.

It is an arithmetic number, because the mean of its divisors is an integer number (3640845).

Almost surely, 2^28566477 is an apocalyptic number.

It is an amenable number.

28566477 is a deficient number, since it is larger than the sum of its proper divisors (15123663).

28566477 is a wasteful number, since it uses less digits than its factorization.

28566477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186732 (or 186729 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The square root of 28566477 is about 5344.7616410837. The cubic root of 28566477 is about 305.6930473144.

The spelling of 28566477 in words is "twenty-eight million, five hundred sixty-six thousand, four hundred seventy-seven".