491158458 has 192 divisors, whose sum is σ = 1374019200. Its totient is φ = 129185280.

The previous prime is 491158439. The next prime is 491158477. The reversal of 491158458 is 854851194.

It is a happy number.

491158458 is a `hidden beast` number, since 4 + 9 + 11 + 584 + 58 = 666.

It is an interprime number because it is at equal distance from previous prime (491158439) and next prime (491158477).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2743813 + ... + 2743991.

It is an arithmetic number, because the mean of its divisors is an integer number (7156350).

Almost surely, 2^491158458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491158458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (687009600).

491158458 is an abundant number, since it is smaller than the sum of its proper divisors (882860742).

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

491158458 is a wasteful number, since it uses less digits than its factorization.

491158458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282 (or 269 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 491158458 is about 22162.0950724429. The cubic root of 491158458 is about 788.9943182230.

The spelling of 491158458 in words is "four hundred ninety-one million, one hundred fifty-eight thousand, four hundred fifty-eight".