491823880 has 16 divisors (see below), whose sum is σ = 1106603820. Its totient is φ = 196729536.

The previous prime is 491823877. The next prime is 491823931. The reversal of 491823880 is 88328194.

It can be written as a sum of positive squares in 2 ways, for example, as 489913956 + 1909924 = 22134^2 + 1382^2 .

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 3 ways as a sum of consecutive naturals, for example, 6147759 + ... + 6147838.

Almost surely, 2^491823880 is an apocalyptic number.

491823880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491823880 is an abundant number, since it is smaller than the sum of its proper divisors (614779940).

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

491823880 is a wasteful number, since it uses less digits than its factorization.

491823880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12295608 (or 12295604 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 43.

The square root of 491823880 is about 22177.1026060665. The cubic root of 491823880 is about 789.3504675474.

The spelling of 491823880 in words is "four hundred ninety-one million, eight hundred twenty-three thousand, eight hundred eighty".