4389321 has 16 divisors (see below), whose sum is σ = 6110720. Its totient is φ = 2799360.

The previous prime is 4389313. The next prime is 4389367. The reversal of 4389321 is 1239834.

4389321 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 4389321 - 2³ = 4389313 is a prime.

It is a super-2 number, since 2×4389321² = 38532277682082, which contains 22 as substring.

Its product of digits (5184) is a multiple of the sum of its prime divisors (576).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4389221) 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, 9921 + ... + 10353.

It is an arithmetic number, because the mean of its divisors is an integer number (381920).

Almost surely, 2^4389321 is an apocalyptic number.

It is an amenable number.

4389321 is a deficient number, since it is larger than the sum of its proper divisors (1721399).

4389321 is a wasteful number, since it uses less digits than its factorization.

4389321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576.

The product of its digits is 5184, while the sum is 30.

The square root of 4389321 is about 2095.0706432004. The cubic root of 4389321 is about 163.7315780609.

The spelling of 4389321 in words is "four million, three hundred eighty-nine thousand, three hundred twenty-one".