257228 has 12 divisors (see below), whose sum is σ = 455112. Its totient is φ = 127200.

The previous prime is 257221. The next prime is 257239. The reversal of 257228 is 822752.

It is a junction number, because it is equal to n+sod(n) for n = 257197 and 257206.

It is not an unprimeable number, because it can be changed into a prime (257221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128 + ... + 728.

It is an arithmetic number, because the mean of its divisors is an integer number (37926).

2²⁵⁷²²⁸ is an apocalyptic number.

It is an amenable number.

257228 is a deficient number, since it is larger than the sum of its proper divisors (197884).

257228 is a wasteful number, since it uses less digits than its factorization.

257228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 710 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 257228 is about 507.1764978782. The cubic root of 257228 is about 63.5974076973.

The spelling of 257228 in words is "two hundred fifty-seven thousand, two hundred twenty-eight".