491357196 has 72 divisors (see below), whose sum is σ = 1377234768. Its totient is φ = 146448000.

The previous prime is 491357183. The next prime is 491357219. The reversal of 491357196 is 691753194.

491357196 is a `hidden beast` number, since 491 + 3 + 5 + 71 + 96 = 666.

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 23 ways as a sum of consecutive naturals, for example, 13986 + ... + 34326.

Almost surely, 2^491357196 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 491357196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688617384).

491357196 is an abundant number, since it is smaller than the sum of its proper divisors (885877572).

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

491357196 is a wasteful number, since it uses less digits than its factorization.

491357196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20423 (or 20418 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 491357196 is about 22166.5783557138. The cubic root of 491357196 is about 789.1007210929.

The spelling of 491357196 in words is "four hundred ninety-one million, three hundred fifty-seven thousand, one hundred ninety-six".