4431389 has 4 divisors (see below), whose sum is σ = 4664640. Its totient is φ = 4198140.

The previous prime is 4431367. The next prime is 4431443. The reversal of 4431389 is 9831344.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4431389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4431289) 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, 116597 + ... + 116634.

It is an arithmetic number, because the mean of its divisors is an integer number (1166160).

Almost surely, 2^4431389 is an apocalyptic number.

It is an amenable number.

4431389 is a deficient number, since it is larger than the sum of its proper divisors (233251).

4431389 is a wasteful number, since it uses less digits than its factorization.

4431389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233250.

The product of its digits is 10368, while the sum is 32.

The square root of 4431389 is about 2105.0864590320. The cubic root of 4431389 is about 164.2529929251.

The spelling of 4431389 in words is "four million, four hundred thirty-one thousand, three hundred eighty-nine".