8522240 has 40 divisors (see below), whose sum is σ = 20439540. Its totient is φ = 3407872.

The previous prime is 8522237. The next prime is 8522251. The reversal of 8522240 is 422258.

It can be written as a sum of positive squares in 2 ways, for example, as 8386816 + 135424 = 2896^2 + 368^2 .

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 3 ways as a sum of consecutive naturals, for example, 896 + ... + 4224.

Almost surely, 2^8522240 is an apocalyptic number.

8522240 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 8522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10219770).

8522240 is an abundant number, since it is smaller than the sum of its proper divisors (11917300).

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

8522240 is an equidigital number, since it uses as much as digits as its factorization.

8522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352 (or 3336 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 8522240 is about 2919.2875843260. The cubic root of 8522240 is about 204.2605922595.

Adding to 8522240 its reverse (422258), we get a palindrome (8944498).

The spelling of 8522240 in words is "eight million, five hundred twenty-two thousand, two hundred forty".