8729218 has 8 divisors (see below), whose sum is σ = 13197312. Its totient is φ = 4330116.

The previous prime is 8729207. The next prime is 8729219. The reversal of 8729218 is 8129278.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (8729219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16930 + ... + 17437.

It is an arithmetic number, because the mean of its divisors is an integer number (1649664).

Almost surely, 2^8729218 is an apocalyptic number.

8729218 is a deficient number, since it is larger than the sum of its proper divisors (4468094).

8729218 is a wasteful number, since it uses less digits than its factorization.

8729218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34496.

The product of its digits is 16128, while the sum is 37.

The square root of 8729218 is about 2954.5250041250. The cubic root of 8729218 is about 205.9009955652.

The spelling of 8729218 in words is "eight million, seven hundred twenty-nine thousand, two hundred eighteen".