491594784 has 48 divisors (see below), whose sum is σ = 1291671360. Its totient is φ = 163708160.

The previous prime is 491594783. The next prime is 491594833. The reversal of 491594784 is 487495194.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (491594783) 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 7 ways as a sum of consecutive naturals, for example, 143362 + ... + 146750.

It is an arithmetic number, because the mean of its divisors is an integer number (26909820).

Almost surely, 2^491594784 is an apocalyptic number.

It is an amenable number.

491594784 is an abundant number, since it is smaller than the sum of its proper divisors (800076576).

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

491594784 is a wasteful number, since it uses less digits than its factorization.

491594784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4913 (or 4905 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 51.

The square root of 491594784 is about 22171.9368572076. The cubic root of 491594784 is about 789.2278863228.

It can be divided in two parts, 4915 and 94784, that added together give a palindrome (99699).

The spelling of 491594784 in words is "four hundred ninety-one million, five hundred ninety-four thousand, seven hundred eighty-four".