581057240 has 64 divisors (see below), whose sum is σ = 1405555200. Its totient is φ = 215491968.

The previous prime is 581057231. The next prime is 581057249. The reversal of 581057240 is 42750185.

It is an interprime number because it is at equal distance from previous prime (581057231) and next prime (581057249).

It is a junction number, because it is equal to n+sod(n) for n = 581057197 and 581057206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581057249) 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 15 ways as a sum of consecutive naturals, for example, 27587 + ... + 43853.

It is an arithmetic number, because the mean of its divisors is an integer number (21961800).

Almost surely, 2^581057240 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 581057240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (702777600).

581057240 is an abundant number, since it is smaller than the sum of its proper divisors (824497960).

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

581057240 is a wasteful number, since it uses less digits than its factorization.

581057240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16344 (or 16340 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 581057240 is about 24105.1289148181. The cubic root of 581057240 is about 834.4615027469.

The spelling of 581057240 in words is "five hundred eighty-one million, fifty-seven thousand, two hundred forty".