491688952 has 8 divisors (see below), whose sum is σ = 921916800. Its totient is φ = 245844472.

The previous prime is 491688941. The next prime is 491688959. The reversal of 491688952 is 259886194.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 491688952.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491688959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30730552 + ... + 30730567.

It is an arithmetic number, because the mean of its divisors is an integer number (115239600).

Almost surely, 2^491688952 is an apocalyptic number.

It is an amenable number.

491688952 is a deficient number, since it is larger than the sum of its proper divisors (430227848).

491688952 is a wasteful number, since it uses less digits than its factorization.

491688952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61461125 (or 61461121 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 52.

The square root of 491688952 is about 22174.0603408577. The cubic root of 491688952 is about 789.2782769216.

The spelling of 491688952 in words is "four hundred ninety-one million, six hundred eighty-eight thousand, nine hundred fifty-two".