8720885 has 8 divisors (see below), whose sum is σ = 10662840. Its totient is φ = 6844864.

The previous prime is 8720839. The next prime is 8720891. The reversal of 8720885 is 5880278.

8720885 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3066001 + 5654884 = 1751^2 + 2378^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 8720885 - 2⁸ = 8720629 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16190 + ... + 16719.

It is an arithmetic number, because the mean of its divisors is an integer number (1332855).

Almost surely, 2^8720885 is an apocalyptic number.

It is an amenable number.

8720885 is a deficient number, since it is larger than the sum of its proper divisors (1941955).

8720885 is a wasteful number, since it uses less digits than its factorization.

8720885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32967.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 8720885 is about 2953.1144576531. The cubic root of 8720885 is about 205.8354563133.

The spelling of 8720885 in words is "eight million, seven hundred twenty thousand, eight hundred eighty-five".