28236666 has 16 divisors (see below), whose sum is σ = 56974464. Its totient is φ = 9328704.

The previous prime is 28236647. The next prime is 28236673. The reversal of 28236666 is 66663282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20146 + ... + 21501.

It is an arithmetic number, because the mean of its divisors is an integer number (3560904).

Almost surely, 2^28236666 is an apocalyptic number.

28236666 is an abundant number, since it is smaller than the sum of its proper divisors (28737798).

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

28236666 is a wasteful number, since it uses less digits than its factorization.

28236666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41765.

The product of its digits is 124416, while the sum is 39.

The square root of 28236666 is about 5313.8184011123. The cubic root of 28236666 is about 304.5120424701.

The spelling of 28236666 in words is "twenty-eight million, two hundred thirty-six thousand, six hundred sixty-six".