491128792 has 32 divisors (see below), whose sum is σ = 1148094720. Its totient is φ = 191348640.

The previous prime is 491128783. The next prime is 491128811. The reversal of 491128792 is 297821194.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 398028 + ... + 399259.

It is an arithmetic number, because the mean of its divisors is an integer number (35877960).

Almost surely, 2^491128792 is an apocalyptic number.

It is an amenable number.

491128792 is an abundant number, since it is smaller than the sum of its proper divisors (656965928).

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

491128792 is a wasteful number, since it uses less digits than its factorization.

491128792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797311 (or 797307 counting only the distinct ones).

The product of its digits is 72576, while the sum is 43.

The square root of 491128792 is about 22161.4257664077. The cubic root of 491128792 is about 788.9784328020.

The spelling of 491128792 in words is "four hundred ninety-one million, one hundred twenty-eight thousand, seven hundred ninety-two".