257678295 has 16 divisors (see below), whose sum is σ = 471183360. Its totient is φ = 117795744.

The previous prime is 257678287. The next prime is 257678303. The reversal of 257678295 is 592876752.

It is an interprime number because it is at equal distance from previous prime (257678287) and next prime (257678303).

It is not a de Polignac number, because 257678295 - 2³ = 257678287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1226935 + ... + 1227144.

It is an arithmetic number, because the mean of its divisors is an integer number (29448960).

Almost surely, 2^257678295 is an apocalyptic number.

257678295 is a deficient number, since it is larger than the sum of its proper divisors (213505065).

257678295 is a wasteful number, since it uses less digits than its factorization.

257678295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454094.

The product of its digits is 2116800, while the sum is 51.

The square root of 257678295 is about 16052.3610412923. The cubic root of 257678295 is about 636.3449658375.

The spelling of 257678295 in words is "two hundred fifty-seven million, six hundred seventy-eight thousand, two hundred ninety-five".