581013856 has 48 divisors (see below), whose sum is σ = 1196294400. Its totient is φ = 277250688.

The previous prime is 581013841. The next prime is 581013919. The reversal of 581013856 is 658310185.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631765 + ... + 632683.

It is an arithmetic number, because the mean of its divisors is an integer number (24922800).

Almost surely, 2^581013856 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 581013856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598147200).

581013856 is an abundant number, since it is smaller than the sum of its proper divisors (615280544).

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

581013856 is a wasteful number, since it uses less digits than its factorization.

581013856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 581013856 is about 24104.2290065457. The cubic root of 581013856 is about 834.4407341797.

The spelling of 581013856 in words is "five hundred eighty-one million, thirteen thousand, eight hundred fifty-six".