404224393 has 4 divisors (see below), whose sum is σ = 412824960. Its totient is φ = 395623828.

The previous prime is 404224357. The next prime is 404224397. The reversal of 404224393 is 393422404.

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 404224393 - 2¹³ = 404216201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404224397) 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, 4300213 + ... + 4300306.

It is an arithmetic number, because the mean of its divisors is an integer number (103206240).

Almost surely, 2^404224393 is an apocalyptic number.

It is an amenable number.

404224393 is a deficient number, since it is larger than the sum of its proper divisors (8600567).

404224393 is an equidigital number, since it uses as much as digits as its factorization.

404224393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8600566.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 404224393 is about 20105.3324518646. The cubic root of 404224393 is about 739.3910213829.

Adding to 404224393 its reverse (393422404), we get a palindrome (797646797).

The spelling of 404224393 in words is "four hundred four million, two hundred twenty-four thousand, three hundred ninety-three".