491040080 has 40 divisors (see below), whose sum is σ = 1143081600. Its totient is φ = 196172928.

The previous prime is 491040059. The next prime is 491040089. The reversal of 491040080 is 80040194.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×491040080² = 482240720332812800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491040089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70181 + ... + 76859.

It is an arithmetic number, because the mean of its divisors is an integer number (28577040).

Almost surely, 2^491040080 is an apocalyptic number.

491040080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491040080 is an abundant number, since it is smaller than the sum of its proper divisors (652041520).

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

491040080 is a wasteful number, since it uses less digits than its factorization.

491040080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7611 (or 7605 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 491040080 is about 22159.4241802444. The cubic root of 491040080 is about 788.9309258680.

The spelling of 491040080 in words is "four hundred ninety-one million, forty thousand, eighty".