581040 has 80 divisors (see below), whose sum is σ = 2008800. Its totient is φ = 154368.

The previous prime is 581029. The next prime is 581041. The reversal of 581040 is 40185.

581040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 581040.

It is not an unprimeable number, because it can be changed into a prime (581041) by changing a digit.

581040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2026 + ... + 2294.

It is an arithmetic number, because the mean of its divisors is an integer number (25110).

2⁵⁸¹⁰⁴⁰ 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 581040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1004400).

581040 is an abundant number, since it is smaller than the sum of its proper divisors (1427760).

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

581040 is a wasteful number, since it uses less digits than its factorization.

581040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 279 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 581040 is about 762.2597982315. The cubic root of 581040 is about 83.4453249826.

The spelling of 581040 in words is "five hundred eighty-one thousand, forty".