28557166 has 8 divisors (see below), whose sum is σ = 46729944. Its totient is φ = 12980520.

The previous prime is 28557149. The next prime is 28557173. The reversal of 28557166 is 66175582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649005 + ... + 649048.

It is an arithmetic number, because the mean of its divisors is an integer number (5841243).

Almost surely, 2^28557166 is an apocalyptic number.

28557166 is a deficient number, since it is larger than the sum of its proper divisors (18172778).

28557166 is a wasteful number, since it uses less digits than its factorization.

28557166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1298066.

The product of its digits is 100800, while the sum is 40.

The square root of 28557166 is about 5343.8905303159. The cubic root of 28557166 is about 305.6598310232.

The spelling of 28557166 in words is "twenty-eight million, five hundred fifty-seven thousand, one hundred sixty-six".