531056328 has 64 divisors (see below), whose sum is σ = 1466726400. Its totient is φ = 158882880.

The previous prime is 531056299. The next prime is 531056329. The reversal of 531056328 is 823650135.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (531056329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8125 + ... + 33587.

It is an arithmetic number, because the mean of its divisors is an integer number (22917600).

Almost surely, 2^531056328 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 531056328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733363200).

531056328 is an abundant number, since it is smaller than the sum of its proper divisors (935670072).

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

531056328 is a wasteful number, since it uses less digits than its factorization.

531056328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25562 (or 25558 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 531056328 is about 23044.6594246910. The cubic root of 531056328 is about 809.8045192046.

The spelling of 531056328 in words is "five hundred thirty-one million, fifty-six thousand, three hundred twenty-eight".