581857872 has 20 divisors (see below), whose sum is σ = 1503132960. Its totient is φ = 193952608.

The previous prime is 581857807. The next prime is 581857873. The reversal of 581857872 is 278758185.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581857873) 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 3 ways as a sum of consecutive naturals, for example, 6060972 + ... + 6061067.

It is an arithmetic number, because the mean of its divisors is an integer number (75156648).

Almost surely, 2^581857872 is an apocalyptic number.

It is an amenable number.

581857872 is an abundant number, since it is smaller than the sum of its proper divisors (921275088).

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

581857872 is a wasteful number, since it uses less digits than its factorization.

581857872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12122050 (or 12122044 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 51.

The square root of 581857872 is about 24121.7302861963. The cubic root of 581857872 is about 834.8445917763.

The spelling of 581857872 in words is "five hundred eighty-one million, eight hundred fifty-seven thousand, eight hundred seventy-two".