491807386 has 16 divisors (see below), whose sum is σ = 844107264. Its totient is φ = 210522384.

The previous prime is 491807369. The next prime is 491807443. The reversal of 491807386 is 683708194.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 8650 + ... + 32533.

It is an arithmetic number, because the mean of its divisors is an integer number (52756704).

Almost surely, 2^491807386 is an apocalyptic number.

491807386 is a deficient number, since it is larger than the sum of its proper divisors (352299878).

491807386 is a wasteful number, since it uses less digits than its factorization.

491807386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42045.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 491807386 is about 22176.7307329101. The cubic root of 491807386 is about 789.3416434590.

The spelling of 491807386 in words is "four hundred ninety-one million, eight hundred seven thousand, three hundred eighty-six".