8721804 has 96 divisors (see below), whose sum is σ = 25715200. Its totient is φ = 2286144.

The previous prime is 8721773. The next prime is 8721851. The reversal of 8721804 is 4081278.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53427 + ... + 53589.

Almost surely, 2^8721804 is an apocalyptic number.

8721804 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8721804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12857600).

8721804 is an abundant number, since it is smaller than the sum of its proper divisors (16993396).

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

8721804 is a wasteful number, since it uses less digits than its factorization.

8721804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 8721804 is about 2953.2700519932. The cubic root of 8721804 is about 205.8426863188.

The spelling of 8721804 in words is "eight million, seven hundred twenty-one thousand, eight hundred four".