5223440 has 20 divisors (see below), whose sum is σ = 12144684. Its totient is φ = 2089344.

The previous prime is 5223431. The next prime is 5223457. The reversal of 5223440 is 443225.

5223440 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 2347024 + 2876416 = 1532^2 + 1696^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an Ulam number.

It is a d-powerful number, because it can be written as 5⁹ + 2 + 2²¹ + 3¹⁰ + 4⁸ + 4¹⁰ + 0 .

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, 32567 + ... + 32726.

Almost surely, 2^5223440 is an apocalyptic number.

It is an amenable number.

5223440 is an abundant number, since it is smaller than the sum of its proper divisors (6921244).

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

5223440 is a wasteful number, since it uses less digits than its factorization.

5223440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65306 (or 65300 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 5223440 is about 2285.4846313200. The cubic root of 5223440 is about 173.5077468601.

Adding to 5223440 its reverse (443225), we get a palindrome (5666665).

The spelling of 5223440 in words is "five million, two hundred twenty-three thousand, four hundred forty".