4390321 has 8 divisors (see below), whose sum is σ = 4843944. Its totient is φ = 3953280.

The previous prime is 4390307. The next prime is 4390327. The reversal of 4390321 is 1230934.

It can be written as a sum of positive squares in 4 ways, for example, as 1296 + 4389025 = 36^2 + 2095^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4390321 - 2⁵ = 4390289 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 4390292 and 4390301.

It is not an unprimeable number, because it can be changed into a prime (4390327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3586 + ... + 4651.

It is an arithmetic number, because the mean of its divisors is an integer number (605493).

Almost surely, 2^4390321 is an apocalyptic number.

4390321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

4390321 is a deficient number, since it is larger than the sum of its proper divisors (453623).

4390321 is a wasteful number, since it uses less digits than its factorization.

4390321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8291.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 4390321 is about 2095.3092850460. The cubic root of 4390321 is about 163.7440112022.

The spelling of 4390321 in words is "four million, three hundred ninety thousand, three hundred twenty-one".