4522440 has 96 divisors (see below), whose sum is σ = 14757120. Its totient is φ = 1108224.

The previous prime is 4522411. The next prime is 4522447. The reversal of 4522440 is 442254.

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4522447) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 20169 + ... + 20391.

It is an arithmetic number, because the mean of its divisors is an integer number (153720).

Almost surely, 2^4522440 is an apocalyptic number.

4522440 is a gapful number since it is divisible by the number (40) 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 4522440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7378560).

4522440 is an abundant number, since it is smaller than the sum of its proper divisors (10234680).

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

4522440 is a wasteful number, since it uses less digits than its factorization.

4522440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4522440 is about 2126.6029248546. The cubic root of 4522440 is about 165.3703343883.

Adding to 4522440 its reverse (442254), we get a palindrome (4964694).

The spelling of 4522440 in words is "four million, five hundred twenty-two thousand, four hundred forty".