491071896 has 224 divisors, whose sum is σ = 1649468160. Its totient is φ = 133949376.

The previous prime is 491071879. The next prime is 491071901. The reversal of 491071896 is 698170194.

It is a happy number.

491071896 is a `hidden beast` number, since 491 + 0 + 71 + 8 + 96 = 666.

It is a congruent 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 55 ways as a sum of consecutive naturals, for example, 938691 + ... + 939213.

Almost surely, 2^491071896 is an apocalyptic number.

491071896 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491071896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824734080).

491071896 is an abundant number, since it is smaller than the sum of its proper divisors (1158396264).

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

491071896 is a wasteful number, since it uses less digits than its factorization.

491071896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 491071896 is about 22160.1420573064. The cubic root of 491071896 is about 788.9479645886.

The spelling of 491071896 in words is "four hundred ninety-one million, seventy-one thousand, eight hundred ninety-six".