404018 has 8 divisors (see below), whose sum is σ = 632448. Its totient is φ = 193204.

The previous prime is 404017. The next prime is 404021. The reversal of 404018 is 810404.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 403987 and 404005.

It is not an unprimeable number, because it can be changed into a prime (404011) 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, 4346 + ... + 4437.

It is an arithmetic number, because the mean of its divisors is an integer number (79056).

2⁴⁰⁴⁰¹⁸ is an apocalyptic number.

404018 is a deficient number, since it is larger than the sum of its proper divisors (228430).

404018 is a wasteful number, since it uses less digits than its factorization.

404018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8808.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 404018 is about 635.6241027526. The cubic root of 404018 is about 73.9265158031.

The spelling of 404018 in words is "four hundred four thousand, eighteen".