402256 has 20 divisors (see below), whose sum is σ = 805504. Its totient is φ = 194400.

The previous prime is 402253. The next prime is 402263. The reversal of 402256 is 652204.

402256 = 11² + 12² + ... + 106².

402256 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

402256 is an admirable number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402253) 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, 91 + ... + 901.

2⁴⁰²²⁵⁶ 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 402256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402752).

402256 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

402256 is a wasteful number, since it uses less digits than its factorization.

402256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 402256 is about 634.2365489311. The cubic root of 402256 is about 73.8188899533.

The spelling of 402256 in words is "four hundred two thousand, two hundred fifty-six".