257706146 has 16 divisors (see below), whose sum is σ = 391523328. Its totient is φ = 127206000.

The previous prime is 257706091. The next prime is 257706149. The reversal of 257706146 is 641607752.

It is not an unprimeable number, because it can be changed into a prime (257706149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 75701 + ... + 79031.

It is an arithmetic number, because the mean of its divisors is an integer number (24470208).

Almost surely, 2^257706146 is an apocalyptic number.

257706146 is a deficient number, since it is larger than the sum of its proper divisors (133817182).

257706146 is a wasteful number, since it uses less digits than its factorization.

257706146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3817.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 257706146 is about 16053.2285226368. The cubic root of 257706146 is about 636.3678913296.

The spelling of 257706146 in words is "two hundred fifty-seven million, seven hundred six thousand, one hundred forty-six".