8722 has 12 divisors (see below), whose sum is σ = 15390.
Its totient is φ = 3696.
The previous prime is 8719. The next prime is 8731. The reversal of 8722 is 2278.
It can be written as a sum of positive squares in only one way, i.e., 8281 + 441 = 91^2 + 21^2
It is a nialpdrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 8722.
It is an unprimeable number.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54 + ... + 142.
28722 is an apocalyptic number.
8722 is a deficient number, since it is larger than the sum of its proper divisors (6668).
8722 is a wasteful number, since it uses less digits than its factorization.
8722 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 105 (or 98 counting only the distinct ones).
The product of its digits is 224, while the sum is 19.
The square root of 8722 is about 93.3916484489.
The cubic root of 8722 is about 20.5844228235.
It can be divided in two parts, 8 and 722, that multiplied together give a square (5776 = 762).
The spelling of 8722 in words is "eight thousand, seven hundred twenty-two".