404818 has 4 divisors (see below), whose sum is σ = 607230. Its totient is φ = 202408.

The previous prime is 404783. The next prime is 404819. The reversal of 404818 is 818404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 363609 + 41209 = 603^2 + 203^2 .

It is a super-2 number, since 2×404818² = 327755226248, which contains 22 as substring.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 404792 and 404801.

It is not an unprimeable number, because it can be changed into a prime (404819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101203 + ... + 101206.

2⁴⁰⁴⁸¹⁸ is an apocalyptic number.

404818 is a deficient number, since it is larger than the sum of its proper divisors (202412).

404818 is a wasteful number, since it uses less digits than its factorization.

404818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202411.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 404818 is about 636.2530942950. The cubic root of 404818 is about 73.9752778386.

The spelling of 404818 in words is "four hundred four thousand, eight hundred eighteen".