581152140 has 144 divisors (see below), whose sum is σ = 1878720480. Its totient is φ = 144906240.

The previous prime is 581152129. The next prime is 581152147. The reversal of 581152140 is 41251185.

It is not an unprimeable number, because it can be changed into a prime (581152147) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 547210 + ... + 548270.

It is an arithmetic number, because the mean of its divisors is an integer number (13046670).

Almost surely, 2^581152140 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 581152140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939360240).

581152140 is an abundant number, since it is smaller than the sum of its proper divisors (1297568340).

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

581152140 is a wasteful number, since it uses less digits than its factorization.

581152140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 581152140 is about 24107.0972951950. The cubic root of 581152140 is about 834.5069291870.

The spelling of 581152140 in words is "five hundred eighty-one million, one hundred fifty-two thousand, one hundred forty".