9281280 has 72 divisors (see below), whose sum is σ = 29654352. Its totient is φ = 2473984.

The previous prime is 9281273. The next prime is 9281281. The reversal of 9281280 is 821829.

It is a super-2 number, since 2×9281280² = 172284316876800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9281281) 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, 2632 + ... + 5048.

It is an arithmetic number, because the mean of its divisors is an integer number (411866).

Almost surely, 2^9281280 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 9281280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14827176).

9281280 is an abundant number, since it is smaller than the sum of its proper divisors (20373072).

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

9281280 is a wasteful number, since it uses less digits than its factorization.

9281280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441 (or 2427 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 9281280 is about 3046.5193253941. The cubic root of 9281280 is about 210.1531762263.

The spelling of 9281280 in words is "nine million, two hundred eighty-one thousand, two hundred eighty".