404375 has 10 divisors (see below), whose sum is σ = 506088. Its totient is φ = 323000.

The previous prime is 404357. The next prime is 404381. The reversal of 404375 is 573404.

It is not a de Polignac number, because 404375 - 2⁸ = 404119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404375.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 302 + ... + 948.

2⁴⁰⁴³⁷⁵ is an apocalyptic number.

404375 is a deficient number, since it is larger than the sum of its proper divisors (101713).

404375 is an frugal number, since it uses more digits than its factorization.

404375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667 (or 652 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 404375 is about 635.9048670988. The cubic root of 404375 is about 73.9482838072.

Adding to 404375 its reverse (573404), we get a palindrome (977779).

The spelling of 404375 in words is "four hundred four thousand, three hundred seventy-five".