581394 has 32 divisors (see below), whose sum is σ = 1327104. Its totient is φ = 168080.

The previous prime is 581393. The next prime is 581407. The reversal of 581394 is 493185.

581394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 581394.

It is not an unprimeable number, because it can be changed into a prime (581393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1327 + ... + 1709.

It is an arithmetic number, because the mean of its divisors is an integer number (41472).

2⁵⁸¹³⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 581394, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663552).

581394 is an abundant number, since it is smaller than the sum of its proper divisors (745710).

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

581394 is a wasteful number, since it uses less digits than its factorization.

581394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422.

The product of its digits is 4320, while the sum is 30.

The square root of 581394 is about 762.4919671708. The cubic root of 581394 is about 83.4622679630.

Subtracting from 581394 its reverse (493185), we obtain a square (88209 = 297²).

The spelling of 581394 in words is "five hundred eighty-one thousand, three hundred ninety-four".