8787220 has 24 divisors (see below), whose sum is σ = 19873224. Its totient is φ = 3244416.

The previous prime is 8787217. The next prime is 8787223. The reversal of 8787220 is 227878.

It is an interprime number because it is at equal distance from previous prime (8787217) and next prime (8787223).

It can be written as a sum of positive squares in 4 ways, for example, as 49284 + 8737936 = 222^2 + 2956^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8787223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16639 + ... + 17158.

It is an arithmetic number, because the mean of its divisors is an integer number (828051).

Almost surely, 2^8787220 is an apocalyptic number.

It is an amenable number.

8787220 is an abundant number, since it is smaller than the sum of its proper divisors (11086004).

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

8787220 is a wasteful number, since it uses less digits than its factorization.

8787220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33819 (or 33817 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 34.

The square root of 8787220 is about 2964.3245436355. The cubic root of 8787220 is about 206.3560311866.

The spelling of 8787220 in words is "eight million, seven hundred eighty-seven thousand, two hundred twenty".