404023 has 4 divisors (see below), whose sum is σ = 417088. Its totient is φ = 390960.

The previous prime is 404021. The next prime is 404029. The reversal of 404023 is 320404.

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

It is a cyclic number.

It is not a de Polignac number, because 404023 - 2¹ = 404021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 403994 and 404012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404021) 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, 6486 + ... + 6547.

It is an arithmetic number, because the mean of its divisors is an integer number (104272).

2⁴⁰⁴⁰²³ is an apocalyptic number.

404023 is a deficient number, since it is larger than the sum of its proper divisors (13065).

404023 is a wasteful number, since it uses less digits than its factorization.

404023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13064.

The product of its (nonzero) digits is 96, while the sum is 13.

The square root of 404023 is about 635.6280358826. The cubic root of 404023 is about 73.9268207656.

Adding to 404023 its reverse (320404), we get a palindrome (724427).

The spelling of 404023 in words is "four hundred four thousand, twenty-three", and thus it is an iban number.