491087884 has 12 divisors (see below), whose sum is σ = 982175824. Its totient is φ = 210466224.

The previous prime is 491087803. The next prime is 491087893. The reversal of 491087884 is 488780194.

491087884 is an admirable number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8769399 + ... + 8769454.

Almost surely, 2^491087884 is an apocalyptic number.

It is an amenable number.

491087884 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.

491087884 is a wasteful number, since it uses less digits than its factorization.

491087884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17538864 (or 17538862 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 491087884 is about 22160.5027921300. The cubic root of 491087884 is about 788.9565265143.

The spelling of 491087884 in words is "four hundred ninety-one million, eighty-seven thousand, eight hundred eighty-four".