28112666 has 16 divisors (see below), whose sum is σ = 44647200. Its totient is φ = 13238928.

The previous prime is 28112659. The next prime is 28112671. The reversal of 28112666 is 66621182.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4736 + ... + 8868.

It is an arithmetic number, because the mean of its divisors is an integer number (2790450).

Almost surely, 2^28112666 is an apocalyptic number.

28112666 is a deficient number, since it is larger than the sum of its proper divisors (16534534).

28112666 is a wasteful number, since it uses less digits than its factorization.

28112666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333.

The product of its digits is 6912, while the sum is 32.

The square root of 28112666 is about 5302.1378707084. The cubic root of 28112666 is about 304.0656382390.

The spelling of 28112666 in words is "twenty-eight million, one hundred twelve thousand, six hundred sixty-six".