491252826 has 16 divisors (see below), whose sum is σ = 982944000. Its totient is φ = 163677888.

The previous prime is 491252761. The next prime is 491252831. The reversal of 491252826 is 628252194.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2671 + ... + 31458.

It is an arithmetic number, because the mean of its divisors is an integer number (61434000).

Almost surely, 2^491252826 is an apocalyptic number.

491252826 is an abundant number, since it is smaller than the sum of its proper divisors (491691174).

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

491252826 is a wasteful number, since it uses less digits than its factorization.

491252826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36533.

The product of its digits is 69120, while the sum is 39.

The square root of 491252826 is about 22164.2240107792. The cubic root of 491252826 is about 789.0448457372.

The spelling of 491252826 in words is "four hundred ninety-one million, two hundred fifty-two thousand, eight hundred twenty-six".