581115060 has 84 divisors (see below), whose sum is σ = 1829721348. Its totient is φ = 154960128.

The previous prime is 581115037. The next prime is 581115061. The reversal of 581115060 is 60511185.

It can be written as a sum of positive squares in 2 ways, for example, as 425514384 + 155600676 = 20628^2 + 12474^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581115061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5349 + ... + 34508.

It is an arithmetic number, because the mean of its divisors is an integer number (21782397).

Almost surely, 2^581115060 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 581115060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914860674).

581115060 is an abundant number, since it is smaller than the sum of its proper divisors (1248606288).

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

581115060 is a wasteful number, since it uses less digits than its factorization.

581115060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39884 (or 39867 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 27.

The square root of 581115060 is about 24106.3282148070. The cubic root of 581115060 is about 834.4891804353.

The spelling of 581115060 in words is "five hundred eighty-one million, one hundred fifteen thousand, sixty".