28229666 has 8 divisors (see below), whose sum is σ = 42473424. Its totient is φ = 14071860.

The previous prime is 28229659. The next prime is 28229681. The reversal of 28229666 is 66692282.

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

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, 20660 + ... + 21983.

It is an arithmetic number, because the mean of its divisors is an integer number (5309178).

Almost surely, 2^28229666 is an apocalyptic number.

28229666 is a deficient number, since it is larger than the sum of its proper divisors (14243758).

28229666 is a wasteful number, since it uses less digits than its factorization.

28229666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42976.

The product of its digits is 124416, while the sum is 41.

The square root of 28229666 is about 5313.1597002161. The cubic root of 28229666 is about 304.4868770762.

The spelling of 28229666 in words is "twenty-eight million, two hundred twenty-nine thousand, six hundred sixty-six".