257942266 has 16 divisors (see below), whose sum is σ = 389460960. Its totient is φ = 128125360.

The previous prime is 257942249. The next prime is 257942273. The reversal of 257942266 is 662249752.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265161 + ... + 266131.

It is an arithmetic number, because the mean of its divisors is an integer number (24341310).

Almost surely, 2^257942266 is an apocalyptic number.

257942266 is a deficient number, since it is larger than the sum of its proper divisors (131518694).

257942266 is a wasteful number, since it uses less digits than its factorization.

257942266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709.

The product of its digits is 362880, while the sum is 43.

The square root of 257942266 is about 16060.5811227365. The cubic root of 257942266 is about 636.5621866813.

The spelling of 257942266 in words is "two hundred fifty-seven million, nine hundred forty-two thousand, two hundred sixty-six".