8427320 has 64 divisors (see below), whose sum is σ = 20995200. Its totient is φ = 3018880.

The previous prime is 8427311. The next prime is 8427323. The reversal of 8427320 is 237248.

It is a self number, because there is not a number n which added to its sum of digits gives 8427320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8427323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46991 + ... + 47169.

It is an arithmetic number, because the mean of its divisors is an integer number (328050).

Almost surely, 2^8427320 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 8427320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10497600).

8427320 is an abundant number, since it is smaller than the sum of its proper divisors (12567880).

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

8427320 is a wasteful number, since it uses less digits than its factorization.

8427320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 8427320 is about 2902.9846709895. The cubic root of 8427320 is about 203.4994134166.

The spelling of 8427320 in words is "eight million, four hundred twenty-seven thousand, three hundred twenty".