321424404 has 24 divisors (see below), whose sum is σ = 857131968. Its totient is φ = 91835520.

The previous prime is 321424403. The next prime is 321424417. The reversal of 321424404 is 404424123.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321424403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1913157 + ... + 1913324.

It is an arithmetic number, because the mean of its divisors is an integer number (35713832).

Almost surely, 2^321424404 is an apocalyptic number.

It is an amenable number.

321424404 is an abundant number, since it is smaller than the sum of its proper divisors (535707564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

321424404 is a wasteful number, since it uses less digits than its factorization.

321424404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3826495 (or 3826493 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 321424404 is about 17928.3129156092. The cubic root of 321424404 is about 685.0037501349.

Adding to 321424404 its reverse (404424123), we get a palindrome (725848527).

The spelling of 321424404 in words is "three hundred twenty-one million, four hundred twenty-four thousand, four hundred four".