581140992 has 80 divisors (see below), whose sum is σ = 1629761760. Its totient is φ = 183508992.

The previous prime is 581140939. The next prime is 581140997. The reversal of 581140992 is 299041185.

It is a self number, because there is not a number n which added to its sum of digits gives 581140992.

It is not an unprimeable number, because it can be changed into a prime (581140997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19228 + ... + 39140.

It is an arithmetic number, because the mean of its divisors is an integer number (20372022).

Almost surely, 2^581140992 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 581140992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (814880880).

581140992 is an abundant number, since it is smaller than the sum of its proper divisors (1048620768).

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

581140992 is a wasteful number, since it uses less digits than its factorization.

581140992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19953 (or 19937 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 581140992 is about 24106.8660758714. The cubic root of 581140992 is about 834.5015931530.

The spelling of 581140992 in words is "five hundred eighty-one million, one hundred forty thousand, nine hundred ninety-two".