257893856 has 24 divisors (see below), whose sum is σ = 553886424. Its totient is φ = 117224320.

The previous prime is 257893849. The next prime is 257893877. The reversal of 257893856 is 658398752.

It is a junction number, because it is equal to n+sod(n) for n = 257893798 and 257893807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365975 + ... + 366678.

It is an arithmetic number, because the mean of its divisors is an integer number (23078601).

Almost surely, 2^257893856 is an apocalyptic number.

It is an amenable number.

257893856 is an abundant number, since it is smaller than the sum of its proper divisors (295992568).

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

257893856 is a wasteful number, since it uses less digits than its factorization.

257893856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732674 (or 732666 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 53.

The square root of 257893856 is about 16059.0739459036. The cubic root of 257893856 is about 636.5223613566.

The spelling of 257893856 in words is "two hundred fifty-seven million, eight hundred ninety-three thousand, eight hundred fifty-six".