530440 has 32 divisors (see below), whose sum is σ = 1215000. Its totient is φ = 208384.

The previous prime is 530429. The next prime is 530443. The reversal of 530440 is 44035.

530440 = 181² + 182² + ... + 195².

530440 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in 4 ways, for example, as 232324 + 298116 = 482^2 + 546^2 .

It is not an unprimeable number, because it can be changed into a prime (530443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3486 + ... + 3634.

2⁵³⁰⁴⁴⁰ 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 530440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607500).

530440 is an abundant number, since it is smaller than the sum of its proper divisors (684560).

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

530440 is a wasteful number, since it uses less digits than its factorization.

530440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 245 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 530440 is about 728.3131194754. The cubic root of 530440 is about 80.9491119677.

Adding to 530440 its reverse (44035), we get a palindrome (574475).

The spelling of 530440 in words is "five hundred thirty thousand, four hundred forty".