257429930 has 8 divisors (see below), whose sum is σ = 463373892. Its totient is φ = 102971968.

The previous prime is 257429891. The next prime is 257429941. The reversal of 257429930 is 39924752.

It can be written as a sum of positive squares in 2 ways, for example, as 242829889 + 14600041 = 15583^2 + 3821^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12871487 + ... + 12871506.

Almost surely, 2^257429930 is an apocalyptic number.

257429930 is a deficient number, since it is larger than the sum of its proper divisors (205943962).

257429930 is a wasteful number, since it uses less digits than its factorization.

257429930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25743000.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 257429930 is about 16044.6230868787. The cubic root of 257429930 is about 636.1404516227.

The spelling of 257429930 in words is "two hundred fifty-seven million, four hundred twenty-nine thousand, nine hundred thirty".