28866666 has 8 divisors (see below), whose sum is σ = 57733344. Its totient is φ = 9622220.

The previous prime is 28866637. The next prime is 28866689. The reversal of 28866666 is 66666882.

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

28866666 is an admirable number.

28866666 is a modest number, since divided by 6666 gives 2886 as remainder.

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 3 ways as a sum of consecutive naturals, for example, 2405550 + ... + 2405561.

It is an arithmetic number, because the mean of its divisors is an integer number (7216668).

Almost surely, 2^28866666 is an apocalyptic number.

28866666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28866666 is a wasteful number, since it uses less digits than its factorization.

28866666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811116.

The product of its digits is 995328, while the sum is 48.

The square root of 28866666 is about 5372.7707935478. The cubic root of 28866666 is about 306.7601035908.

The spelling of 28866666 in words is "twenty-eight million, eight hundred sixty-six thousand, six hundred sixty-six".