257359668 has 24 divisors (see below), whose sum is σ = 635830272. Its totient is φ = 80740224.

The previous prime is 257359667. The next prime is 257359709. The reversal of 257359668 is 866953752.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 257359668.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257359667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 630580 + ... + 630987.

It is an arithmetic number, because the mean of its divisors is an integer number (26492928).

Almost surely, 2^257359668 is an apocalyptic number.

It is an amenable number.

257359668 is an abundant number, since it is smaller than the sum of its proper divisors (378470604).

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

257359668 is a wasteful number, since it uses less digits than its factorization.

257359668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1261591 (or 1261589 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The square root of 257359668 is about 16042.4333565703. The cubic root of 257359668 is about 636.0825710602.

The spelling of 257359668 in words is "two hundred fifty-seven million, three hundred fifty-nine thousand, six hundred sixty-eight".