256798 has 4 divisors (see below), whose sum is σ = 385200. Its totient is φ = 128398.

The previous prime is 256771. The next prime is 256799. The reversal of 256798 is 897652.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64198 + ... + 64201.

It is an arithmetic number, because the mean of its divisors is an integer number (96300).

2²⁵⁶⁷⁹⁸ is an apocalyptic number.

256798 is a deficient number, since it is larger than the sum of its proper divisors (128402).

256798 is a wasteful number, since it uses less digits than its factorization.

256798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128401.

The product of its digits is 30240, while the sum is 37.

The square root of 256798 is about 506.7524050264. The cubic root of 256798 is about 63.5619499999.

The spelling of 256798 in words is "two hundred fifty-six thousand, seven hundred ninety-eight".