8723220 has 48 divisors (see below), whose sum is σ = 26647488. Its totient is φ = 2114560.

The previous prime is 8723213. The next prime is 8723243. The reversal of 8723220 is 223278.

8723220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5949 + ... + 7268.

It is an arithmetic number, because the mean of its divisors is an integer number (555156).

Almost surely, 2^8723220 is an apocalyptic number.

It is an amenable number.

8723220 is an abundant number, since it is smaller than the sum of its proper divisors (17924268).

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

8723220 is a wasteful number, since it uses less digits than its factorization.

8723220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13240 (or 13238 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 8723220 is about 2953.5097765201. The cubic root of 8723220 is about 205.8538253551.

Adding to 8723220 its reverse (223278), we get a palindrome (8946498).

The spelling of 8723220 in words is "eight million, seven hundred twenty-three thousand, two hundred twenty".