531267440 has 120 divisors (see below), whose sum is σ = 1378599264. Its totient is φ = 190220800.

The previous prime is 531267439. The next prime is 531267449. The reversal of 531267440 is 44762135.

It is a junction number, because it is equal to n+sod(n) for n = 531267397 and 531267406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531267449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 686894 + ... + 687666.

Almost surely, 2^531267440 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 531267440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (689299632).

531267440 is an abundant number, since it is smaller than the sum of its proper divisors (847331824).

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

531267440 is a wasteful number, since it uses less digits than its factorization.

531267440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 862 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 531267440 is about 23049.2394668458. The cubic root of 531267440 is about 809.9118127839.

The spelling of 531267440 in words is "five hundred thirty-one million, two hundred sixty-seven thousand, four hundred forty".