78256 has 20 divisors (see below), whose sum is σ = 155992. Its totient is φ = 38016.

The previous prime is 78241. The next prime is 78259. The reversal of 78256 is 65287.

It is a super-2 number, since 2×78256² = 12248003072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1036 + ... + 1108.

2⁷⁸²⁵⁶ is an apocalyptic number.

It is an amenable number.

78256 is a deficient number, since it is larger than the sum of its proper divisors (77736).

78256 is a wasteful number, since it uses less digits than its factorization.

78256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 142 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 78256 is about 279.7427389585. The cubic root of 78256 is about 42.7732793881.

It can be divided in two parts, 782 and 56, that added together give a palindrome (838).

The spelling of 78256 in words is "seventy-eight thousand, two hundred fifty-six".