491212826 has 8 divisors (see below), whose sum is σ = 793497684. Its totient is φ = 226713600.

The previous prime is 491212789. The next prime is 491212837. The reversal of 491212826 is 628212194.

It can be written as a sum of positive squares in 2 ways, for example, as 490401025 + 811801 = 22145^2 + 901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 9446375 + ... + 9446426.

Almost surely, 2^491212826 is an apocalyptic number.

491212826 is a deficient number, since it is larger than the sum of its proper divisors (302284858).

491212826 is a wasteful number, since it uses less digits than its factorization.

491212826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18892816.

The product of its digits is 13824, while the sum is 35.

The square root of 491212826 is about 22163.3216373359. The cubic root of 491212826 is about 789.0234293037.

The spelling of 491212826 in words is "four hundred ninety-one million, two hundred twelve thousand, eight hundred twenty-six".