404089 has 4 divisors (see below), whose sum is σ = 461824. Its totient is φ = 346356.

The previous prime is 404081. The next prime is 404099. The reversal of 404089 is 980404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404089 - 2³ = 404081 is a prime.

It is a Duffinian number.

404089 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (404081) 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, 28857 + ... + 28870.

It is an arithmetic number, because the mean of its divisors is an integer number (115456).

2⁴⁰⁴⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

404089 is a deficient number, since it is larger than the sum of its proper divisors (57735).

404089 is an equidigital number, since it uses as much as digits as its factorization.

404089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57734.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 404089 is about 635.6799509187. The cubic root of 404089 is about 73.9308460352.

The spelling of 404089 in words is "four hundred four thousand, eighty-nine".