491598 has 24 divisors (see below), whose sum is σ = 1100736. Its totient is φ = 158400.

The previous prime is 491593. The next prime is 491611. The reversal of 491598 is 895194.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491591) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118 + ... + 998.

It is an arithmetic number, because the mean of its divisors is an integer number (45864).

2⁴⁹¹⁵⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491598, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (550368).

491598 is an abundant number, since it is smaller than the sum of its proper divisors (609138).

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

491598 is a wasteful number, since it uses less digits than its factorization.

491598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920 (or 917 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 491598 is about 701.1404994721. The cubic root of 491598 is about 78.9229607355.

It can be divided in two parts, 491 and 598, that added together give a square (1089 = 33²).

The spelling of 491598 in words is "four hundred ninety-one thousand, five hundred ninety-eight".