494391856 has 80 divisors (see below), whose sum is σ = 1157267200. Its totient is φ = 199874304.

The previous prime is 494391853. The next prime is 494391883. The reversal of 494391856 is 658193494.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (494391851) 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, 806206 + ... + 806818.

It is an arithmetic number, because the mean of its divisors is an integer number (14465840).

Almost surely, 2^494391856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 494391856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (578633600).

494391856 is an abundant number, since it is smaller than the sum of its proper divisors (662875344).

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

494391856 is a wasteful number, since it uses less digits than its factorization.

494391856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1026 (or 1020 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 494391856 is about 22234.9242409323. The cubic root of 494391856 is about 790.7219038134.

The spelling of 494391856 in words is "four hundred ninety-four million, three hundred ninety-one thousand, eight hundred fifty-six".