404224 has 18 divisors (see below), whose sum is σ = 807380. Its totient is φ = 201984.

The previous prime is 404221. The next prime is 404249. The reversal of 404224 is 422404.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a plaindrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 404198 and 404207.

It is not an unprimeable number, because it can be changed into a prime (404221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 534 + ... + 1045.

2⁴⁰⁴²²⁴ is an apocalyptic number.

It is an amenable number.

404224 is a deficient number, since it is larger than the sum of its proper divisors (403156).

404224 is an equidigital number, since it uses as much as digits as its factorization.

404224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 404224 is about 635.7861275618. The cubic root of 404224 is about 73.9390781763.

Adding to 404224 its reverse (422404), we get a palindrome (826628).

The spelling of 404224 in words is "four hundred four thousand, two hundred twenty-four", and thus it is an iban number.