257947672 has 8 divisors (see below), whose sum is σ = 483651900. Its totient is φ = 128973832.

The previous prime is 257947643. The next prime is 257947673. The reversal of 257947672 is 276749752.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257947673) 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 as a sum of consecutive naturals, namely, 16121722 + ... + 16121737.

Almost surely, 2^257947672 is an apocalyptic number.

It is an amenable number.

257947672 is a deficient number, since it is larger than the sum of its proper divisors (225704228).

257947672 is a wasteful number, since it uses less digits than its factorization.

257947672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32243465 (or 32243461 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 49.

The square root of 257947672 is about 16060.7494221160. The cubic root of 257947672 is about 636.5666337115.

The spelling of 257947672 in words is "two hundred fifty-seven million, nine hundred forty-seven thousand, six hundred seventy-two".