402404 has 12 divisors (see below), whose sum is σ = 728700. Its totient is φ = 194208.

The previous prime is 402403. The next prime is 402419. The reversal of 402404 is 404204.

It can be written as a sum of positive squares in 2 ways, for example, as 88804 + 313600 = 298^2 + 560^2 .

It is not an unprimeable number, because it can be changed into a prime (402403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1619 + ... + 1850.

It is an arithmetic number, because the mean of its divisors is an integer number (60725).

2⁴⁰²⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

402404 is a deficient number, since it is larger than the sum of its proper divisors (326296).

402404 is a wasteful number, since it uses less digits than its factorization.

402404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502 (or 3500 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 402404 is about 634.3532139116. The cubic root of 402404 is about 73.8279421125.

Adding to 402404 its reverse (404204), we get a palindrome (806608).

The spelling of 402404 in words is "four hundred two thousand, four hundred four", and thus it is an iban number.