257564338 has 8 divisors (see below), whose sum is σ = 386421120. Its totient is φ = 128757300.

The previous prime is 257564311. The next prime is 257564347. The reversal of 257564338 is 833465752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 257564294 and 257564303.

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, 5943 + ... + 23461.

It is an arithmetic number, because the mean of its divisors is an integer number (48302640).

Almost surely, 2^257564338 is an apocalyptic number.

257564338 is a deficient number, since it is larger than the sum of its proper divisors (128856782).

257564338 is a wasteful number, since it uses less digits than its factorization.

257564338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24872.

The product of its digits is 604800, while the sum is 43.

The square root of 257564338 is about 16048.8111086149. The cubic root of 257564338 is about 636.2511451610.

The spelling of 257564338 in words is "two hundred fifty-seven million, five hundred sixty-four thousand, three hundred thirty-eight".