291798 has 48 divisors (see below), whose sum is σ = 720720. Its totient is φ = 84672.

The previous prime is 291791. The next prime is 291817. The reversal of 291798 is 897192.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291798.

It is not an unprimeable number, because it can be changed into a prime (291791) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6765 + ... + 6807.

It is an arithmetic number, because the mean of its divisors is an integer number (15015).

2²⁹¹⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 291798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (360360).

291798 is an abundant number, since it is smaller than the sum of its proper divisors (428922).

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

291798 is a wasteful number, since it uses less digits than its factorization.

291798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93 (or 90 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 291798 is about 540.1833022225. The cubic root of 291798 is about 66.3275725969.

It can be divided in two parts, 291 and 798, that added together give a square (1089 = 33²).

The spelling of 291798 in words is "two hundred ninety-one thousand, seven hundred ninety-eight".