321423004 has 48 divisors (see below), whose sum is σ = 666050560. Its totient is φ = 132814080.

The previous prime is 321423001. The next prime is 321423017. The reversal of 321423004 is 400324123.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321423001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 318052 + ... + 319060.

Almost surely, 2^321423004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321423004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333025280).

321423004 is an abundant number, since it is smaller than the sum of its proper divisors (344627556).

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

321423004 is a wasteful number, since it uses less digits than its factorization.

321423004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1418 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 321423004 is about 17928.2738711790. The cubic root of 321423004 is about 685.0027555966.

Adding to 321423004 its reverse (400324123), we get a palindrome (721747127).

The spelling of 321423004 in words is "three hundred twenty-one million, four hundred twenty-three thousand, four".