256496 has 40 divisors (see below), whose sum is σ = 562464. Its totient is φ = 112640.

The previous prime is 256493. The next prime is 256499. The reversal of 256496 is 694652.

256496 = T₁₇₁ + T₁₇₂ + ... + T₁₈₆.

It is an interprime number because it is at equal distance from previous prime (256493) and next prime (256499).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256493) 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 7 ways as a sum of consecutive naturals, for example, 6236 + ... + 6276.

2²⁵⁶⁴⁹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281232).

256496 is an abundant number, since it is smaller than the sum of its proper divisors (305968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256496 is a wasteful number, since it uses less digits than its factorization.

256496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 83 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 256496 is about 506.4543414761. The cubic root of 256496 is about 63.5370234835.

The spelling of 256496 in words is "two hundred fifty-six thousand, four hundred ninety-six".