491190564 has 24 divisors (see below), whose sum is σ = 1146610528. Its totient is φ = 163658880.

The previous prime is 491190563. The next prime is 491190589. The reversal of 491190564 is 465091194.

It is not an unprimeable number, because it can be changed into a prime (491190563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24924 + ... + 40044.

Almost surely, 2^491190564 is an apocalyptic number.

It is an amenable number.

491190564 is an abundant number, since it is smaller than the sum of its proper divisors (655419964).

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

491190564 is a wasteful number, since it uses less digits than its factorization.

491190564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17835 (or 17833 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 491190564 is about 22162.8194054818. The cubic root of 491190564 is about 789.0115094840.

The spelling of 491190564 in words is "four hundred ninety-one million, one hundred ninety thousand, five hundred sixty-four".