257897814 has 16 divisors (see below), whose sum is σ = 515953152. Its totient is φ = 85939688.

The previous prime is 257897771. The next prime is 257897819. The reversal of 257897814 is 418798752.

It is a super-2 number, since 2×257897814² = 133022564931957192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257897819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34147 + ... + 41009.

It is an arithmetic number, because the mean of its divisors is an integer number (32247072).

Almost surely, 2^257897814 is an apocalyptic number.

257897814 is an abundant number, since it is smaller than the sum of its proper divisors (258055338).

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

257897814 is a wasteful number, since it uses less digits than its factorization.

257897814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13131.

The product of its digits is 1128960, while the sum is 51.

The square root of 257897814 is about 16059.1971779414. The cubic root of 257897814 is about 636.5256176609.

The spelling of 257897814 in words is "two hundred fifty-seven million, eight hundred ninety-seven thousand, eight hundred fourteen".