404221432 has 32 divisors (see below), whose sum is σ = 777093120. Its totient is φ = 197030880.

The previous prime is 404221423. The next prime is 404221439. The reversal of 404221432 is 234122404.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404221439) 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 7 ways as a sum of consecutive naturals, for example, 99913 + ... + 103879.

It is an arithmetic number, because the mean of its divisors is an integer number (24284160).

Almost surely, 2^404221432 is an apocalyptic number.

It is an amenable number.

404221432 is a deficient number, since it is larger than the sum of its proper divisors (372871688).

404221432 is a wasteful number, since it uses less digits than its factorization.

404221432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291 (or 4287 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 404221432 is about 20105.2588145490. The cubic root of 404221432 is about 739.3892159977.

Adding to 404221432 its reverse (234122404), we get a palindrome (638343836).

The spelling of 404221432 in words is "four hundred four million, two hundred twenty-one thousand, four hundred thirty-two".