257740311 has 8 divisors (see below), whose sum is σ = 349287664. Its totient is φ = 169009920.

The previous prime is 257740279. The next prime is 257740319. The reversal of 257740311 is 113047752.

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

It is not a de Polignac number, because 257740311 - 2⁵ = 257740279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257740319) 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, 704026 + ... + 704391.

It is an arithmetic number, because the mean of its divisors is an integer number (43660958).

Almost surely, 2^257740311 is an apocalyptic number.

257740311 is a deficient number, since it is larger than the sum of its proper divisors (91547353).

257740311 is a wasteful number, since it uses less digits than its factorization.

257740311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408481.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 257740311 is about 16054.2926035375. The cubic root of 257740311 is about 636.3960119218.

The spelling of 257740311 in words is "two hundred fifty-seven million, seven hundred forty thousand, three hundred eleven".