491641458 has 32 divisors (see below), whose sum is σ = 1225912320. Its totient is φ = 127698960.

The previous prime is 491641441. The next prime is 491641463. The reversal of 491641458 is 854146194.

It is a super-2 number, since 2×491641458² = 483422646448731528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 531618 + ... + 532541.

It is an arithmetic number, because the mean of its divisors is an integer number (38309760).

Almost surely, 2^491641458 is an apocalyptic number.

491641458 is an abundant number, since it is smaller than the sum of its proper divisors (734270862).

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

491641458 is a wasteful number, since it uses less digits than its factorization.

491641458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064182.

The product of its digits is 138240, while the sum is 42.

The square root of 491641458 is about 22172.9893789719. The cubic root of 491641458 is about 789.2528630298.

The spelling of 491641458 in words is "four hundred ninety-one million, six hundred forty-one thousand, four hundred fifty-eight".