491803386 has 32 divisors (see below), whose sum is σ = 1005818688. Its totient is φ = 160273920.

The previous prime is 491803381. The next prime is 491803393. The reversal of 491803386 is 683308194.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (491803381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43216 + ... + 53396.

It is an arithmetic number, because the mean of its divisors is an integer number (31431834).

Almost surely, 2^491803386 is an apocalyptic number.

491803386 is an abundant number, since it is smaller than the sum of its proper divisors (514015302).

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

491803386 is a wasteful number, since it uses less digits than its factorization.

491803386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10366.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 491803386 is about 22176.6405481083. The cubic root of 491803386 is about 789.3395034782.

The spelling of 491803386 in words is "four hundred ninety-one million, eight hundred three thousand, three hundred eighty-six".