491380446 has 8 divisors (see below), whose sum is σ = 982760904. Its totient is φ = 163793480.

The previous prime is 491380433. The next prime is 491380459. The reversal of 491380446 is 644083194.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (491380433) and next prime (491380459).

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

491380446 is an admirable number.

It is a super-2 number, since 2×491380446² = 482909485422317832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40948365 + ... + 40948376.

It is an arithmetic number, because the mean of its divisors is an integer number (122845113).

Almost surely, 2^491380446 is an apocalyptic number.

491380446 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.

491380446 is a wasteful number, since it uses less digits than its factorization.

491380446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81896746.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 491380446 is about 22167.1027876897. The cubic root of 491380446 is about 789.1131670979.

The spelling of 491380446 in words is "four hundred ninety-one million, three hundred eighty thousand, four hundred forty-six".