402756 has 12 divisors (see below), whose sum is σ = 939792. Its totient is φ = 134248.

The previous prime is 402751. The next prime is 402757. The reversal of 402756 is 657204.

It is a happy number.

402756 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (402751) by changing a digit.

402756 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 16770 + ... + 16793.

It is an arithmetic number, because the mean of its divisors is an integer number (78316).

2⁴⁰²⁷⁵⁶ is an apocalyptic number.

It is an amenable number.

402756 is an abundant number, since it is smaller than the sum of its proper divisors (537036).

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

402756 is a wasteful number, since it uses less digits than its factorization.

402756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33570 (or 33568 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 402756 is about 634.6306012162. The cubic root of 402756 is about 73.8494626589.

The spelling of 402756 in words is "four hundred two thousand, seven hundred fifty-six".