257689148 has 12 divisors (see below), whose sum is σ = 470562960. Its totient is φ = 123242592.

The previous prime is 257689139. The next prime is 257689151. The reversal of 257689148 is 841986752.

257689148 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 257689096 and 257689105.

It is a congruent number.

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, 1400393 + ... + 1400576.

It is an arithmetic number, because the mean of its divisors is an integer number (39213580).

Almost surely, 2^257689148 is an apocalyptic number.

It is an amenable number.

257689148 is a deficient number, since it is larger than the sum of its proper divisors (212873812).

257689148 is a wasteful number, since it uses less digits than its factorization.

257689148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800996 (or 2800994 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 257689148 is about 16052.6990876924. The cubic root of 257689148 is about 636.3538996581.

The spelling of 257689148 in words is "two hundred fifty-seven million, six hundred eighty-nine thousand, one hundred forty-eight".