402808 has 16 divisors (see below), whose sum is σ = 863280. Its totient is φ = 172608.

The previous prime is 402803. The next prime is 402817. The reversal of 402808 is 808204.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402803) by changing a digit.

402808 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, 3541 + ... + 3652.

It is an arithmetic number, because the mean of its divisors is an integer number (53955).

2⁴⁰²⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

402808 is an abundant number, since it is smaller than the sum of its proper divisors (460472).

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

402808 is a wasteful number, since it uses less digits than its factorization.

402808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7206 (or 7202 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 402808 is about 634.6715686085. The cubic root of 402808 is about 73.8526407674.

The spelling of 402808 in words is "four hundred two thousand, eight hundred eight".