491497806 has 8 divisors (see below), whose sum is σ = 982995624. Its totient is φ = 163832600.

The previous prime is 491497793. The next prime is 491497813. The reversal of 491497806 is 608794194.

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

491497806 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40958145 + ... + 40958156.

It is an arithmetic number, because the mean of its divisors is an integer number (122874453).

Almost surely, 2^491497806 is an apocalyptic number.

491497806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

491497806 is a wasteful number, since it uses less digits than its factorization.

491497806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81916306.

The product of its (nonzero) digits is 435456, while the sum is 48.

The square root of 491497806 is about 22169.7497956111. The cubic root of 491497806 is about 789.1759853277.

The spelling of 491497806 in words is "four hundred ninety-one million, four hundred ninety-seven thousand, eight hundred six".