28716018 has 16 divisors (see below), whose sum is σ = 57970080. Its totient is φ = 9482336.

The previous prime is 28716001. The next prime is 28716041. The reversal of 28716018 is 81061782.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28716018.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21723 + ... + 23006.

It is an arithmetic number, because the mean of its divisors is an integer number (3623130).

Almost surely, 2^28716018 is an apocalyptic number.

28716018 is an abundant number, since it is smaller than the sum of its proper divisors (29254062).

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

28716018 is a wasteful number, since it uses less digits than its factorization.

28716018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44841.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28716018 is about 5358.7328726108. The cubic root of 28716018 is about 306.2255375157.

The spelling of 28716018 in words is "twenty-eight million, seven hundred sixteen thousand, eighteen".