28666274 has 24 divisors (see below), whose sum is σ = 53869788. Its totient is φ = 11340000.

The previous prime is 28666247. The next prime is 28666283. The reversal of 28666274 is 47266682.

It can be written as a sum of positive squares in 2 ways, for example, as 27636049 + 1030225 = 5257^2 + 1015^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9977 + ... + 12524.

Almost surely, 2^28666274 is an apocalyptic number.

28666274 is a deficient number, since it is larger than the sum of its proper divisors (25203514).

28666274 is a wasteful number, since it uses less digits than its factorization.

28666274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22530 (or 22523 counting only the distinct ones).

The product of its digits is 193536, while the sum is 41.

The square root of 28666274 is about 5354.0894650725. The cubic root of 28666274 is about 306.0486131774.

The spelling of 28666274 in words is "twenty-eight million, six hundred sixty-six thousand, two hundred seventy-four".