321404604 has 12 divisors (see below), whose sum is σ = 749944104. Its totient is φ = 107134864.

The previous prime is 321404597. The next prime is 321404609. The reversal of 321404604 is 406404123.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321404609) 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, 13391847 + ... + 13391870.

It is an arithmetic number, because the mean of its divisors is an integer number (62495342).

Almost surely, 2^321404604 is an apocalyptic number.

It is an amenable number.

321404604 is an abundant number, since it is smaller than the sum of its proper divisors (428539500).

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

321404604 is a wasteful number, since it uses less digits than its factorization.

321404604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26783724 (or 26783722 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 321404604 is about 17927.7607079077. The cubic root of 321404604 is about 684.9896842533.

Adding to 321404604 its reverse (406404123), we get a palindrome (727808727).

The spelling of 321404604 in words is "three hundred twenty-one million, four hundred four thousand, six hundred four".