257047394 has 8 divisors (see below), whose sum is σ = 385659948. Its totient is φ = 128494080.

The previous prime is 257047369. The next prime is 257047459. The reversal of 257047394 is 493740752.

It can be written as a sum of positive squares in 2 ways, for example, as 248850625 + 8196769 = 15775^2 + 2863^2 .

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

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, 1607 + ... + 22730.

Almost surely, 2^257047394 is an apocalyptic number.

257047394 is a deficient number, since it is larger than the sum of its proper divisors (128612554).

257047394 is a wasteful number, since it uses less digits than its factorization.

257047394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29620.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 257047394 is about 16032.6976519861. The cubic root of 257047394 is about 635.8251978634.

The spelling of 257047394 in words is "two hundred fifty-seven million, forty-seven thousand, three hundred ninety-four".