491836340 has 24 divisors (see below), whose sum is σ = 1042336680. Its totient is φ = 194928768.

The previous prime is 491836327. The next prime is 491836357. The reversal of 491836340 is 43638194.

It can be written as a sum of positive squares in 4 ways, for example, as 31047184 + 460789156 = 5572^2 + 21466^2 .

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 491836294 and 491836303.

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, 110627 + ... + 114986.

It is an arithmetic number, because the mean of its divisors is an integer number (43430695).

Almost surely, 2^491836340 is an apocalyptic number.

It is an amenable number.

491836340 is an abundant number, since it is smaller than the sum of its proper divisors (550500340).

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

491836340 is a wasteful number, since it uses less digits than its factorization.

491836340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225731 (or 225729 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 491836340 is about 22177.3835246631. The cubic root of 491836340 is about 789.3571333643.

The spelling of 491836340 in words is "four hundred ninety-one million, eight hundred thirty-six thousand, three hundred forty".