8522440 has 64 divisors (see below), whose sum is σ = 20684160. Its totient is φ = 3148800.

The previous prime is 8522429. The next prime is 8522461. The reversal of 8522440 is 442258.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56365 + ... + 56515.

It is an arithmetic number, because the mean of its divisors is an integer number (323190).

Almost surely, 2^8522440 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 8522440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10342080).

8522440 is an abundant number, since it is smaller than the sum of its proper divisors (12161720).

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

8522440 is a wasteful number, since it uses less digits than its factorization.

8522440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 8522440 is about 2919.3218390578. The cubic root of 8522440 is about 204.2621901101.

Adding to 8522440 its reverse (442258), we get a palindrome (8964698).

It can be divided in two parts, 85224 and 40, that added together give a square (85264 = 292²).

The spelling of 8522440 in words is "eight million, five hundred twenty-two thousand, four hundred forty".