531640832 has 30 divisors (see below), whose sum is σ = 1063286763. Its totient is φ = 265559552.

The previous prime is 531640819. The next prime is 531640859. The reversal of 531640832 is 238046135.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 265820416 + 265820416 = 16304^2 + 16304^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=16304.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a Duffinian number.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 521219 + ... + 522237.

Almost surely, 2^531640832 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 531640832

531640832 is an abundant number, since it is smaller than the sum of its proper divisors (531645931).

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

531640832 is an frugal number, since it uses more digits than its factorization.

531640832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2056 (or 1021 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 531640832 is about 23057.3379209309. The cubic root of 531640832 is about 810.1015124515.

Multiplying 531640832 by its sum of digits (32), we get a square (17012506624 = 130432²).

531640832 divided by its sum of digits (32) gives a square (16613776 = 4076²).

Adding to 531640832 its reverse (238046135), we get a palindrome (769686967).

The spelling of 531640832 in words is "five hundred thirty-one million, six hundred forty thousand, eight hundred thirty-two".