491665030 has 16 divisors (see below), whose sum is σ = 906583104. Its totient is φ = 191869120.

The previous prime is 491665021. The next prime is 491665081. The reversal of 491665030 is 30566194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 599182 + ... + 600001.

It is an arithmetic number, because the mean of its divisors is an integer number (56661444).

Almost surely, 2^491665030 is an apocalyptic number.

491665030 is a deficient number, since it is larger than the sum of its proper divisors (414918074).

491665030 is a wasteful number, since it uses less digits than its factorization.

491665030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199231.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 491665030 is about 22173.5209202328. The cubic root of 491665030 is about 789.2654765383.

The spelling of 491665030 in words is "four hundred ninety-one million, six hundred sixty-five thousand, thirty".