28233686 has 8 divisors (see below), whose sum is σ = 45608304. Its totient is φ = 13030920.

The previous prime is 28233637. The next prime is 28233691. The reversal of 28233686 is 68633282.

It is a happy number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542930 + ... + 542981.

It is an arithmetic number, because the mean of its divisors is an integer number (5701038).

Almost surely, 2^28233686 is an apocalyptic number.

28233686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28233686 is a deficient number, since it is larger than the sum of its proper divisors (17374618).

28233686 is a wasteful number, since it uses less digits than its factorization.

28233686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085926.

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

The square root of 28233686 is about 5313.5379927126. The cubic root of 28233686 is about 304.5013297109.

The spelling of 28233686 in words is "twenty-eight million, two hundred thirty-three thousand, six hundred eighty-six".