257423872 has 20 divisors (see below), whose sum is σ = 514345986. Its totient is φ = 128711680.

The previous prime is 257423869. The next prime is 257423891. The reversal of 257423872 is 278324752.

It can be written as a sum of positive squares in only one way, i.e., 132342016 + 125081856 = 11504^2 + 11184^2 .

It is a zygodrome in base 4.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250879 + ... + 251902.

Almost surely, 2^257423872 is an apocalyptic number.

It is an amenable number.

257423872 is a deficient number, since it is larger than the sum of its proper divisors (256922114).

257423872 is an frugal number, since it uses more digits than its factorization.

257423872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502799 (or 502783 counting only the distinct ones).

The product of its digits is 188160, while the sum is 40.

The square root of 257423872 is about 16044.4342997813. The cubic root of 257423872 is about 636.1354615670.

The spelling of 257423872 in words is "two hundred fifty-seven million, four hundred twenty-three thousand, eight hundred seventy-two".