8280720 has 240 divisors, whose sum is σ = 33426432. Its totient is φ = 1797120.

The previous prime is 8280707. The next prime is 8280721. The reversal of 8280720 is 270828.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (8280721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 156214 + ... + 156266.

Almost surely, 2^8280720 is an apocalyptic number.

8280720 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 8280720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16713216).

8280720 is an abundant number, since it is smaller than the sum of its proper divisors (25145712).

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

8280720 is a wasteful number, since it uses less digits than its factorization.

8280720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 101 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 8280720 is about 2877.6240199164. The cubic root of 8280720 is about 202.3124921802.

The spelling of 8280720 in words is "eight million, two hundred eighty thousand, seven hundred twenty".