28285668 has 36 divisors (see below), whose sum is σ = 71705088. Its totient is φ = 9401520.

The previous prime is 28285667. The next prime is 28285679. The reversal of 28285668 is 86658282.

28285668 is a `hidden beast` number, since 2 + 82 + 8 + 566 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (28285667) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14605 + ... + 16427.

It is an arithmetic number, because the mean of its divisors is an integer number (1991808).

Almost surely, 2^28285668 is an apocalyptic number.

It is an amenable number.

28285668 is an abundant number, since it is smaller than the sum of its proper divisors (43419420).

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

28285668 is a wasteful number, since it uses less digits than its factorization.

28285668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264 (or 2259 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 28285668 is about 5318.4272111217. The cubic root of 28285668 is about 304.6880910600.

The spelling of 28285668 in words is "twenty-eight million, two hundred eighty-five thousand, six hundred sixty-eight".