491250858 has 16 divisors (see below), whose sum is σ = 1122859200. Its totient is φ = 140357376.

The previous prime is 491250847. The next prime is 491250863. The reversal of 491250858 is 858052194.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 11696449 = 491250858 / (4 + 9 + 1 + 2 + 5 + 0 + 8 + 5 + 8).

It is a Curzon 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, 5848183 + ... + 5848266.

It is an arithmetic number, because the mean of its divisors is an integer number (70178700).

Almost surely, 2^491250858 is an apocalyptic number.

491250858 is an abundant number, since it is smaller than the sum of its proper divisors (631608342).

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

491250858 is a wasteful number, since it uses less digits than its factorization.

491250858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11696461.

The product of its (nonzero) digits is 115200, while the sum is 42.

The square root of 491250858 is about 22164.1796148651. The cubic root of 491250858 is about 789.0437920759.

The spelling of 491250858 in words is "four hundred ninety-one million, two hundred fifty thousand, eight hundred fifty-eight".