512440 has 32 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 195712.

The previous prime is 512429. The next prime is 512443. The reversal of 512440 is 44215.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 642 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (37665).

2⁵¹²⁴⁴⁰ 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 512440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (602640).

512440 is an abundant number, since it is smaller than the sum of its proper divisors (692840).

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

512440 is a wasteful number, since it uses less digits than its factorization.

512440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 587 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 512440 is about 715.8491461195. The cubic root of 512440 is about 80.0229101051.

Adding to 512440 its reverse (44215), we get a palindrome (556655).

The spelling of 512440 in words is "five hundred twelve thousand, four hundred forty".