491914872 has 24 divisors (see below), whose sum is σ = 1332269640. Its totient is φ = 163971600.

The previous prime is 491914853. The next prime is 491914879. The reversal of 491914872 is 278419194.

It is a happy number.

491914872 is a `hidden beast` number, since 491 + 91 + 4 + 8 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491914879) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3416004 + ... + 3416147.

It is an arithmetic number, because the mean of its divisors is an integer number (55511235).

Almost surely, 2^491914872 is an apocalyptic number.

It is an amenable number.

491914872 is an abundant number, since it is smaller than the sum of its proper divisors (840354768).

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

491914872 is a wasteful number, since it uses less digits than its factorization.

491914872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832163 (or 6832156 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 491914872 is about 22179.1539964896. The cubic root of 491914872 is about 789.3991436093.

It can be divided in two parts, 4919 and 14872, that added together give a palindrome (19791).

The spelling of 491914872 in words is "four hundred ninety-one million, nine hundred fourteen thousand, eight hundred seventy-two".