8318640 has 160 divisors (see below), whose sum is σ = 29569536. Its totient is φ = 1914880.

The previous prime is 8318603. The next prime is 8318641. The reversal of 8318640 is 468138.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8318598 and 8318607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8318641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60652 + ... + 60788.

Almost surely, 2^8318640 is an apocalyptic number.

8318640 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 8318640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14784768).

8318640 is an abundant number, since it is smaller than the sum of its proper divisors (21250896).

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

8318640 is a wasteful number, since it uses less digits than its factorization.

8318640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 8318640 is about 2884.2052631531. The cubic root of 8318640 is about 202.6208393227.

The spelling of 8318640 in words is "eight million, three hundred eighteen thousand, six hundred forty".