491889024 has 320 divisors, whose sum is σ = 1688385600. Its totient is φ = 140590080.

The previous prime is 491889019. The next prime is 491889029. The reversal of 491889024 is 420988194.

It is an interprime number because it is at equal distance from previous prime (491889019) and next prime (491889029).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491889029) 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 39 ways as a sum of consecutive naturals, for example, 2166799 + ... + 2167025.

It is an arithmetic number, because the mean of its divisors is an integer number (5276205).

Almost surely, 2^491889024 is an apocalyptic number.

491889024 is a gapful number since it is divisible by the number (44) 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 491889024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844192800).

491889024 is an abundant number, since it is smaller than the sum of its proper divisors (1196496576).

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

491889024 is a wasteful number, since it uses less digits than its factorization.

491889024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 491889024 is about 22178.5712795031. The cubic root of 491889024 is about 789.3853168629.

The spelling of 491889024 in words is "four hundred ninety-one million, eight hundred eighty-nine thousand, twenty-four".