581398 has 8 divisors (see below), whose sum is σ = 878400. Its totient is φ = 288600.

The previous prime is 581393. The next prime is 581407. The reversal of 581398 is 893185.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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

581398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 678 + ... + 1273.

It is an arithmetic number, because the mean of its divisors is an integer number (109800).

2⁵⁸¹³⁹⁸ is an apocalyptic number.

581398 is a deficient number, since it is larger than the sum of its proper divisors (297002).

581398 is a wasteful number, since it uses less digits than its factorization.

581398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102.

The product of its digits is 8640, while the sum is 34.

The square root of 581398 is about 762.4945901447. The cubic root of 581398 is about 83.4624593698.

It can be divided in two parts, 581 and 398, that added together give a palindrome (979).

The spelling of 581398 in words is "five hundred eighty-one thousand, three hundred ninety-eight".