9115280 has 40 divisors (see below), whose sum is σ = 21929400. Its totient is φ = 3519488.

The previous prime is 9115279. The next prime is 9115297. The reversal of 9115280 is 825119.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 163216 + 8952064 = 404^2 + 2992^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 4284.

It is an arithmetic number, because the mean of its divisors is an integer number (548235).

Almost surely, 2^9115280 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 9115280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10964700).

9115280 is an abundant number, since it is smaller than the sum of its proper divisors (12814120).

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

9115280 is a wasteful number, since it uses less digits than its factorization.

9115280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3971 (or 3965 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 9115280 is about 3019.1521988797. The cubic root of 9115280 is about 208.8927358747.

It can be divided in two parts, 9 and 115280, that multiplied together give a triangular number (1037520 = T₁₄₄₀).

The spelling of 9115280 in words is "nine million, one hundred fifteen thousand, two hundred eighty".