8664320 has 72 divisors (see below), whose sum is σ = 23743104. Its totient is φ = 2967552.

The previous prime is 8664317. The next prime is 8664329. The reversal of 8664320 is 234668.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8664329) 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, 8477 + ... + 9443.

Almost surely, 2^8664320 is an apocalyptic number.

8664320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8664320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11871552).

8664320 is an abundant number, since it is smaller than the sum of its proper divisors (15078784).

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

8664320 is an equidigital number, since it uses as much as digits as its factorization.

8664320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 8664320 is about 2943.5217002767. The cubic root of 8664320 is about 205.3894638623.

Adding to 8664320 its reverse (234668), we get a palindrome (8898988).

The spelling of 8664320 in words is "eight million, six hundred sixty-four thousand, three hundred twenty".