531344440 has 64 divisors (see below), whose sum is σ = 1311176160. Its totient is φ = 192184320.

The previous prime is 531344431. The next prime is 531344449. The reversal of 531344440 is 44443135.

It is an interprime number because it is at equal distance from previous prime (531344431) and next prime (531344449).

It is a junction number, because it is equal to n+sod(n) for n = 531344399 and 531344408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531344449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81792 + ... + 88048.

Almost surely, 2^531344440 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 531344440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (655588080).

531344440 is an abundant number, since it is smaller than the sum of its proper divisors (779831720).

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

531344440 is a wasteful number, since it uses less digits than its factorization.

531344440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472 (or 6468 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 531344440 is about 23050.9097434353. The cubic root of 531344440 is about 809.9509394662.

Adding to 531344440 its reverse (44443135), we get a palindrome (575787575).

The spelling of 531344440 in words is "five hundred thirty-one million, three hundred forty-four thousand, four hundred forty".