489345857 has 32 divisors (see below), whose sum is σ = 659124480. Its totient is φ = 350853120.

The previous prime is 489345853. The next prime is 489345863. The reversal of 489345857 is 758543984.

It is a cyclic number.

It is not a de Polignac number, because 489345857 - 2² = 489345853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 489345799 and 489345808.

It is not an unprimeable number, because it can be changed into a prime (489345853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432869 + ... + 433997.

It is an arithmetic number, because the mean of its divisors is an integer number (20597640).

Almost surely, 2^489345857 is an apocalyptic number.

It is an amenable number.

489345857 is a deficient number, since it is larger than the sum of its proper divisors (169778623).

489345857 is a wasteful number, since it uses less digits than its factorization.

489345857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593.

The product of its digits is 4838400, while the sum is 53.

The square root of 489345857 is about 22121.1631023326. The cubic root of 489345857 is about 788.0225376197.

The spelling of 489345857 in words is "four hundred eighty-nine million, three hundred forty-five thousand, eight hundred fifty-seven".