489251857 has 12 divisors (see below), whose sum is σ = 523732176. Its totient is φ = 456921920.

The previous prime is 489251849. The next prime is 489251899. The reversal of 489251857 is 758152984.

It is a happy number.

It is not a de Polignac number, because 489251857 - 2³ = 489251849 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 489251857.

It is not an unprimeable number, because it can be changed into a prime (489231857) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31398 + ... + 44320.

It is an arithmetic number, because the mean of its divisors is an integer number (43644348).

Almost surely, 2^489251857 is an apocalyptic number.

It is an amenable number.

489251857 is a deficient number, since it is larger than the sum of its proper divisors (34480319).

489251857 is a wasteful number, since it uses less digits than its factorization.

489251857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13088 (or 13071 counting only the distinct ones).

The product of its digits is 806400, while the sum is 49.

The square root of 489251857 is about 22119.0383380472. The cubic root of 489251857 is about 787.9720764711.

The spelling of 489251857 in words is "four hundred eighty-nine million, two hundred fifty-one thousand, eight hundred fifty-seven".