491589120 has 360 divisors, whose sum is σ = 1805775048. Its totient is φ = 113991680.

The previous prime is 491589101. The next prime is 491589167. The reversal of 491589120 is 21985194.

It is a congruent number.

It is an unprimeable 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 35 ways as a sum of consecutive naturals, for example, 21373429 + ... + 21373451.

Almost surely, 2^491589120 is an apocalyptic number.

491589120 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491589120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902887524).

491589120 is an abundant number, since it is smaller than the sum of its proper divisors (1314185928).

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

491589120 is a wasteful number, since it uses less digits than its factorization.

491589120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 491589120 is about 22171.8091278091. The cubic root of 491589120 is about 789.2248552329.

The spelling of 491589120 in words is "four hundred ninety-one million, five hundred eighty-nine thousand, one hundred twenty".