28673566 has 12 divisors (see below), whose sum is σ = 43416072. Its totient is φ = 14202296.

The previous prime is 28673549. The next prime is 28673573. The reversal of 28673566 is 66537682.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 97716 + ... + 98008.

It is an arithmetic number, because the mean of its divisors is an integer number (3618006).

Almost surely, 2^28673566 is an apocalyptic number.

28673566 is a deficient number, since it is larger than the sum of its proper divisors (14742506).

28673566 is an equidigital number, since it uses as much as digits as its factorization.

28673566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 462 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 28673566 is about 5354.7703965716. The cubic root of 28673566 is about 306.0745614082.

The spelling of 28673566 in words is "twenty-eight million, six hundred seventy-three thousand, five hundred sixty-six".