8999680 has 72 divisors (see below), whose sum is σ = 22075200. Its totient is φ = 3514368.

The previous prime is 8999671. The next prime is 8999687. The reversal of 8999680 is 869998.

It is not an unprimeable number, because it can be changed into a prime (8999687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101076 + ... + 101164.

It is an arithmetic number, because the mean of its divisors is an integer number (306600).

Almost surely, 2^8999680 is an apocalyptic number.

8999680 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 8999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11037600).

8999680 is an abundant number, since it is smaller than the sum of its proper divisors (13075520).

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

8999680 is an equidigital number, since it uses as much as digits as its factorization.

8999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 8999680 is about 2999.9466661926. The cubic root of 8999680 is about 208.0059169914.

The spelling of 8999680 in words is "eight million, nine hundred ninety-nine thousand, six hundred eighty".