321388004 has 12 divisors (see below), whose sum is σ = 642776064. Its totient is φ = 137737704.

The previous prime is 321388003. The next prime is 321388007. The reversal of 321388004 is 400883123.

It is a happy number.

321388004 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (321388003) 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, 5739044 + ... + 5739099.

It is an arithmetic number, because the mean of its divisors is an integer number (53564672).

Almost surely, 2^321388004 is an apocalyptic number.

It is an amenable number.

321388004 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

321388004 is a wasteful number, since it uses less digits than its factorization.

321388004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11478154 (or 11478152 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 321388004 is about 17927.2977327873. The cubic root of 321388004 is about 684.9778912004.

The spelling of 321388004 in words is "three hundred twenty-one million, three hundred eighty-eight thousand, four".