28002166 has 8 divisors (see below), whose sum is σ = 42285600. Its totient is φ = 13906968.

The previous prime is 28002157. The next prime is 28002193. The reversal of 28002166 is 66120082.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28002166.

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, 46686 + ... + 47281.

It is an arithmetic number, because the mean of its divisors is an integer number (5285700).

Almost surely, 2^28002166 is an apocalyptic number.

28002166 is a deficient number, since it is larger than the sum of its proper divisors (14283434).

28002166 is a wasteful number, since it uses less digits than its factorization.

28002166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94118.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 28002166 is about 5291.7072859333. The cubic root of 28002166 is about 303.6667270472. Note that the first 3 decimals are identical.

The spelling of 28002166 in words is "twenty-eight million, two thousand, one hundred sixty-six".