531417322288728 has 96 divisors (see below), whose sum is σ = 1466714600058240. Its totient is φ = 173760878753280.

The previous prime is 531417322288717. The next prime is 531417322288759. The reversal of 531417322288728 is 827882223714135.

It is a happy number.

531417322288728 is a `hidden beast` number, since 5 + 3 + 1 + 4 + 1 + 7 + 322 + 288 + 7 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4021900 + ... + 32848292.

It is an arithmetic number, because the mean of its divisors is an integer number (15278277083940).

Almost surely, 2^{531417322288728} 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 531417322288728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (733357300029120).

531417322288728 is an abundant number, since it is smaller than the sum of its proper divisors (935297277769512).

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

531417322288728 is a wasteful number, since it uses less digits than its factorization.

531417322288728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28831289 (or 28831282 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 63.

The spelling of 531417322288728 in words is "five hundred thirty-one trillion, four hundred seventeen billion, three hundred twenty-two million, two hundred eighty-eight thousand, seven hundred twenty-eight".