491095720 has 16 divisors (see below), whose sum is σ = 1104965460. Its totient is φ = 196438272.

The previous prime is 491095697. The next prime is 491095727. The reversal of 491095720 is 27590194.

It can be written as a sum of positive squares in 2 ways, for example, as 416894724 + 74200996 = 20418^2 + 8614^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 491095720.

It is not an unprimeable number, because it can be changed into a prime (491095727) 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 3 ways as a sum of consecutive naturals, for example, 6138657 + ... + 6138736.

Almost surely, 2^491095720 is an apocalyptic number.

491095720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491095720 is an abundant number, since it is smaller than the sum of its proper divisors (613869740).

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

491095720 is a wasteful number, since it uses less digits than its factorization.

491095720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12277404 (or 12277400 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 491095720 is about 22160.6795924674. The cubic root of 491095720 is about 788.9607227968.

The spelling of 491095720 in words is "four hundred ninety-one million, ninety-five thousand, seven hundred twenty".