581669868 has 48 divisors (see below), whose sum is σ = 1472841216. Its totient is φ = 177602880.

The previous prime is 581669867. The next prime is 581669897. The reversal of 581669868 is 868966185.

It is not an unprimeable number, because it can be changed into a prime (581669863) 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, 6205 + ... + 34667.

It is an arithmetic number, because the mean of its divisors is an integer number (30684192).

Almost surely, 2^581669868 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 581669868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (736420608).

581669868 is an abundant number, since it is smaller than the sum of its proper divisors (891171348).

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

581669868 is a wasteful number, since it uses less digits than its factorization.

581669868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28614 (or 28612 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 57.

The square root of 581669868 is about 24117.8329872317. The cubic root of 581669868 is about 834.7546665914.

The spelling of 581669868 in words is "five hundred eighty-one million, six hundred sixty-nine thousand, eight hundred sixty-eight".