257876847 has 12 divisors (see below), whose sum is σ = 373184344. Its totient is φ = 171596880.

The previous prime is 257876837. The next prime is 257876849. The reversal of 257876847 is 748678752.

It is a happy number.

257876847 is a `hidden beast` number, since 2 + 578 + 7 + 68 + 4 + 7 = 666.

It is not a de Polignac number, because 257876847 - 2⁶ = 257876783 is a prime.

It is a super-2 number, since 2×257876847² = 133000936437322818, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257876793 and 257876802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257876849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21613 + ... + 31350.

Almost surely, 2^257876847 is an apocalyptic number.

257876847 is a deficient number, since it is larger than the sum of its proper divisors (115307497).

257876847 is a wasteful number, since it uses less digits than its factorization.

257876847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53510 (or 53507 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 54.

The square root of 257876847 is about 16058.5443611804. The cubic root of 257876847 is about 636.5083674251.

The spelling of 257876847 in words is "two hundred fifty-seven million, eight hundred seventy-six thousand, eight hundred forty-seven".