404211423 has 16 divisors (see below), whose sum is σ = 671936256. Its totient is φ = 209979840.

The previous prime is 404211403. The next prime is 404211427. The reversal of 404211423 is 324112404.

It is not a de Polignac number, because 404211423 - 2⁸ = 404211167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 404211423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404211427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874686 + ... + 875147.

It is an arithmetic number, because the mean of its divisors is an integer number (41996016).

Almost surely, 2^404211423 is an apocalyptic number.

404211423 is a deficient number, since it is larger than the sum of its proper divisors (267724833).

404211423 is a wasteful number, since it uses less digits than its factorization.

404211423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749854.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 404211423 is about 20105.0098980329. The cubic root of 404211423 is about 739.3831132307.

Adding to 404211423 its reverse (324112404), we get a palindrome (728323827).

The spelling of 404211423 in words is "four hundred four million, two hundred eleven thousand, four hundred twenty-three".