28633286 has 16 divisors (see below), whose sum is σ = 46964880. Its totient is φ = 12984480.

The previous prime is 28633277. The next prime is 28633289. The reversal of 28633286 is 68233682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28633289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9920 + ... + 12476.

It is an arithmetic number, because the mean of its divisors is an integer number (2935305).

Almost surely, 2^28633286 is an apocalyptic number.

28633286 is a deficient number, since it is larger than the sum of its proper divisors (18331594).

28633286 is a wasteful number, since it uses less digits than its factorization.

28633286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3079.

The product of its digits is 82944, while the sum is 38.

The square root of 28633286 is about 5351.0079424348. The cubic root of 28633286 is about 305.9311719548.

The spelling of 28633286 in words is "twenty-eight million, six hundred thirty-three thousand, two hundred eighty-six".