491382528 has 288 divisors, whose sum is σ = 1648281600. Its totient is φ = 126517248.

The previous prime is 491382523. The next prime is 491382547. The reversal of 491382528 is 825283194.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 491382528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491382523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5521108 + ... + 5521196.

It is an arithmetic number, because the mean of its divisors is an integer number (5723200).

Almost surely, 2^491382528 is an apocalyptic number.

491382528 is a gapful number since it is divisible by the number (48) 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 491382528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824140800).

491382528 is an abundant number, since it is smaller than the sum of its proper divisors (1156899072).

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

491382528 is a wasteful number, since it uses less digits than its factorization.

491382528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 193 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 491382528 is about 22167.1497491220. The cubic root of 491382528 is about 789.1142815984.

The spelling of 491382528 in words is "four hundred ninety-one million, three hundred eighty-two thousand, five hundred twenty-eight".