566440 has 72 divisors (see below), whose sum is σ = 1574910. Its totient is φ = 182784.

The previous prime is 566437. The next prime is 566441. The reversal of 566440 is 44665.

It is a happy number.

566440 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in 3 ways, for example, as 550564 + 15876 = 742^2 + 126^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (566441) 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 17 ways as a sum of consecutive naturals, for example, 33312 + ... + 33328.

2⁵⁶⁶⁴⁴⁰ 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 566440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (787455).

566440 is an abundant number, since it is smaller than the sum of its proper divisors (1008470).

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

566440 is a wasteful number, since it uses less digits than its factorization.

566440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 566440 is about 752.6220831201. The cubic root of 566440 is about 82.7404676819.

The spelling of 566440 in words is "five hundred sixty-six thousand, four hundred forty".