531151728 has 60 divisors (see below), whose sum is σ = 1389926664. Its totient is φ = 174768000.

The previous prime is 531151717. The next prime is 531151729. The reversal of 531151728 is 827151135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531151729) 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 11 ways as a sum of consecutive naturals, for example, 1604523 + ... + 1604853.

Almost surely, 2^531151728 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 531151728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694963332).

531151728 is an abundant number, since it is smaller than the sum of its proper divisors (858774936).

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

531151728 is a wasteful number, since it uses less digits than its factorization.

531151728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774 (or 437 counting only the distinct ones).

The product of its digits is 8400, while the sum is 33.

The square root of 531151728 is about 23046.7292256407. The cubic root of 531151728 is about 809.8530079251.

The spelling of 531151728 in words is "five hundred thirty-one million, one hundred fifty-one thousand, seven hundred twenty-eight".