402856 has 16 divisors (see below), whose sum is σ = 776340. Its totient is φ = 195840.

The previous prime is 402851. The next prime is 402859. The reversal of 402856 is 658204.

It can be written as a sum of positive squares in 2 ways, for example, as 401956 + 900 = 634^2 + 30^2 .

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 402856.

It is not an unprimeable number, because it can be changed into a prime (402851) by changing a digit.

402856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385 + ... + 976.

2⁴⁰²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

402856 is a deficient number, since it is larger than the sum of its proper divisors (373484).

402856 is a wasteful number, since it uses less digits than its factorization.

402856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404 (or 1400 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 402856 is about 634.7093823160. The cubic root of 402856 is about 73.8555741633.

The spelling of 402856 in words is "four hundred two thousand, eight hundred fifty-six".