491159784 has 64 divisors (see below), whose sum is σ = 1342103040. Its totient is φ = 149114880.

The previous prime is 491159771. The next prime is 491159789. The reversal of 491159784 is 487951194.

It is not an unprimeable number, because it can be changed into a prime (491159789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6769 + ... + 32064.

It is an arithmetic number, because the mean of its divisors is an integer number (20970360).

Almost surely, 2^491159784 is an apocalyptic number.

It is an amenable number.

491159784 is an abundant number, since it is smaller than the sum of its proper divisors (850943256).

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

491159784 is a wasteful number, since it uses less digits than its factorization.

491159784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38890 (or 38886 counting only the distinct ones).

The product of its digits is 362880, while the sum is 48.

The square root of 491159784 is about 22162.1249883670. The cubic root of 491159784 is about 788.9950282488.

The spelling of 491159784 in words is "four hundred ninety-one million, one hundred fifty-nine thousand, seven hundred eighty-four".