8722656 has 72 divisors (see below), whose sum is σ = 25631424. Its totient is φ = 2810880.

The previous prime is 8722643. The next prime is 8722661. The reversal of 8722656 is 6562278.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 8722656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8440 + ... + 9416.

It is an arithmetic number, because the mean of its divisors is an integer number (355992).

Almost surely, 2^8722656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8722656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12815712).

8722656 is an abundant number, since it is smaller than the sum of its proper divisors (16908768).

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

8722656 is a wasteful number, since it uses less digits than its factorization.

8722656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024 (or 1013 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 8722656 is about 2953.4142953538. The cubic root of 8722656 is about 205.8493887647.

The spelling of 8722656 in words is "eight million, seven hundred twenty-two thousand, six hundred fifty-six".