530840 has 32 divisors (see below), whose sum is σ = 1248480. Its totient is φ = 202752.

The previous prime is 530837. The next prime is 530843. The reversal of 530840 is 48035.

It is an interprime number because it is at equal distance from previous prime (530837) and next prime (530843).

It is a super-2 number, since 2×530840² = 563582211200, which contains 22 as substring.

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

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (530843) 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 7 ways as a sum of consecutive naturals, for example, 632 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (39015).

2⁵³⁰⁸⁴⁰ 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 530840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (624240).

530840 is an abundant number, since it is smaller than the sum of its proper divisors (717640).

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

530840 is a wasteful number, since it uses less digits than its factorization.

530840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 530840 is about 728.5876748889. The cubic root of 530840 is about 80.9694545193.

Adding to 530840 its reverse (48035), we get a palindrome (578875).

The spelling of 530840 in words is "five hundred thirty thousand, eight hundred forty".