28566693 has 12 divisors (see below), whose sum is σ = 41342028. Its totient is φ = 19008000.

The previous prime is 28566689. The next prime is 28566737. The reversal of 28566693 is 39666582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28227969 + 338724 = 5313^2 + 582^2 .

It is not a de Polignac number, because 28566693 - 2² = 28566689 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566623) 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, 2443 + ... + 7943.

It is an arithmetic number, because the mean of its divisors is an integer number (3445169).

Almost surely, 2^28566693 is an apocalyptic number.

It is an amenable number.

28566693 is a deficient number, since it is larger than the sum of its proper divisors (12775335).

28566693 is a wasteful number, since it uses less digits than its factorization.

28566693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084 (or 6081 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 28566693 is about 5344.7818477465. The cubic root of 28566693 is about 305.6938177925.

The spelling of 28566693 in words is "twenty-eight million, five hundred sixty-six thousand, six hundred ninety-three".