491698584 has 96 divisors (see below), whose sum is σ = 1464765120. Its totient is φ = 148059648.

The previous prime is 491698579. The next prime is 491698591. The reversal of 491698584 is 485896194.

491698584 is a `hidden beast` number, since 49 + 16 + 9 + 8 + 584 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 491698584.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38404 + ... + 49580.

It is an arithmetic number, because the mean of its divisors is an integer number (15257970).

Almost surely, 2^491698584 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 491698584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (732382560).

491698584 is an abundant number, since it is smaller than the sum of its proper divisors (973066536).

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

491698584 is a wasteful number, since it uses less digits than its factorization.

491698584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11249 (or 11242 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The square root of 491698584 is about 22174.2775305082. The cubic root of 491698584 is about 789.2834307753.

The spelling of 491698584 in words is "four hundred ninety-one million, six hundred ninety-eight thousand, five hundred eighty-four".