8720286 has 48 divisors (see below), whose sum is σ = 19097856. Its totient is φ = 2652544.

The previous prime is 8720281. The next prime is 8720311. The reversal of 8720286 is 6820278.

8720286 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8720281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81445 + ... + 81551.

It is an arithmetic number, because the mean of its divisors is an integer number (397872).

Almost surely, 2^8720286 is an apocalyptic number.

8720286 is an abundant number, since it is smaller than the sum of its proper divisors (10377570).

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

8720286 is a wasteful number, since it uses less digits than its factorization.

8720286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 8720286 is about 2953.0130375601. The cubic root of 8720286 is about 205.8307435553.

The spelling of 8720286 in words is "eight million, seven hundred twenty thousand, two hundred eighty-six".