257742258 has 32 divisors (see below), whose sum is σ = 555244800. Its totient is φ = 79497936.

The previous prime is 257742257. The next prime is 257742269. The reversal of 257742258 is 852247752.

It is not an unprimeable number, because it can be changed into a prime (257742257) 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 15 ways as a sum of consecutive naturals, for example, 21388 + ... + 31191.

It is an arithmetic number, because the mean of its divisors is an integer number (17351400).

Almost surely, 2^257742258 is an apocalyptic number.

257742258 is an abundant number, since it is smaller than the sum of its proper divisors (297502542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257742258 is a wasteful number, since it uses less digits than its factorization.

257742258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52646.

The product of its digits is 313600, while the sum is 42.

The square root of 257742258 is about 16054.3532414109. The cubic root of 257742258 is about 636.3976143874.

The spelling of 257742258 in words is "two hundred fifty-seven million, seven hundred forty-two thousand, two hundred fifty-eight".