491570844 has 48 divisors (see below), whose sum is σ = 1253661696. Its totient is φ = 149241600.

The previous prime is 491570837. The next prime is 491570857. The reversal of 491570844 is 448075194.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 491570796 and 491570805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32542 + ... + 45189.

It is an arithmetic number, because the mean of its divisors is an integer number (26117952).

Almost surely, 2^491570844 is an apocalyptic number.

It is an amenable number.

491570844 is an abundant number, since it is smaller than the sum of its proper divisors (762090852).

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

491570844 is a wasteful number, since it uses less digits than its factorization.

491570844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77786 (or 77784 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 491570844 is about 22171.3969789907. The cubic root of 491570844 is about 789.2150746719.

The spelling of 491570844 in words is "four hundred ninety-one million, five hundred seventy thousand, eight hundred forty-four".