28666886 has 8 divisors (see below), whose sum is σ = 43258320. Its totient is φ = 14247448.

The previous prime is 28666843. The next prime is 28666903. The reversal of 28666886 is 68866682.

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, 42581 + ... + 43248.

It is an arithmetic number, because the mean of its divisors is an integer number (5407290).

Almost surely, 2^28666886 is an apocalyptic number.

28666886 is a deficient number, since it is larger than the sum of its proper divisors (14591434).

28666886 is a wasteful number, since it uses less digits than its factorization.

28666886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85998.

The product of its digits is 1327104, while the sum is 50.

The square root of 28666886 is about 5354.1466173425. The cubic root of 28666886 is about 306.0507911190.

The spelling of 28666886 in words is "twenty-eight million, six hundred sixty-six thousand, eight hundred eighty-six".