257641870 has 16 divisors (see below), whose sum is σ = 464483808. Its totient is φ = 102894880.

The previous prime is 257641859. The next prime is 257641873. The reversal of 257641870 is 78146752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257641873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13441 + ... + 26380.

It is an arithmetic number, because the mean of its divisors is an integer number (29030238).

Almost surely, 2^257641870 is an apocalyptic number.

257641870 is a deficient number, since it is larger than the sum of its proper divisors (206841938).

257641870 is a wasteful number, since it uses less digits than its factorization.

257641870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40475.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 257641870 is about 16051.2264328929. The cubic root of 257641870 is about 636.3149801821.

The spelling of 257641870 in words is "two hundred fifty-seven million, six hundred forty-one thousand, eight hundred seventy".