8728218 has 24 divisors (see below), whose sum is σ = 19102356. Its totient is φ = 2880000.

The previous prime is 8728211. The next prime is 8728241. The reversal of 8728218 is 8128278.

It can be written as a sum of positive squares in 2 ways, for example, as 7800849 + 927369 = 2793^2 + 963^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8728211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 583 + ... + 4218.

Almost surely, 2^8728218 is an apocalyptic number.

8728218 is an abundant number, since it is smaller than the sum of its proper divisors (10374138).

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

8728218 is a wasteful number, since it uses less digits than its factorization.

8728218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4910 (or 4907 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 8728218 is about 2954.3557673374. The cubic root of 8728218 is about 205.8931327433.

The spelling of 8728218 in words is "eight million, seven hundred twenty-eight thousand, two hundred eighteen".