491533056 has 144 divisors (see below), whose sum is σ = 1661363200. Its totient is φ = 140424192.

The previous prime is 491533037. The next prime is 491533079. The reversal of 491533056 is 650335194.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 491533056.

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 15 ways as a sum of consecutive naturals, for example, 43305 + ... + 53463.

Almost surely, 2^491533056 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 491533056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830681600).

491533056 is an abundant number, since it is smaller than the sum of its proper divisors (1169830144).

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

491533056 is a wasteful number, since it uses less digits than its factorization.

491533056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10191 (or 10171 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 491533056 is about 22170.5447835636. The cubic root of 491533056 is about 789.1948513248.

The spelling of 491533056 in words is "four hundred ninety-one million, five hundred thirty-three thousand, fifty-six".