257563434 has 16 divisors (see below), whose sum is σ = 522383040. Its totient is φ = 84645120.

The previous prime is 257563429. The next prime is 257563441. The reversal of 257563434 is 434365752.

It is a junction number, because it is equal to n+sod(n) for n = 257563392 and 257563401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301879 + ... + 302730.

It is an arithmetic number, because the mean of its divisors is an integer number (32648940).

Almost surely, 2^257563434 is an apocalyptic number.

257563434 is an abundant number, since it is smaller than the sum of its proper divisors (264819606).

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

257563434 is a wasteful number, since it uses less digits than its factorization.

257563434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604685.

The product of its digits is 302400, while the sum is 39.

The square root of 257563434 is about 16048.7829445102. The cubic root of 257563434 is about 636.2504007882.

The spelling of 257563434 in words is "two hundred fifty-seven million, five hundred sixty-three thousand, four hundred thirty-four".