4390389 has 16 divisors (see below), whose sum is σ = 6566400. Its totient is φ = 2899008.

The previous prime is 4390381. The next prime is 4390409. The reversal of 4390389 is 9830934.

It is not a de Polignac number, because 4390389 - 2³ = 4390381 is a prime.

It is an Ulam number.

4390389 is a lucky number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390381) 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, 2332 + ... + 3770.

It is an arithmetic number, because the mean of its divisors is an integer number (410400).

Almost surely, 2^4390389 is an apocalyptic number.

It is an amenable number.

4390389 is a deficient number, since it is larger than the sum of its proper divisors (2176011).

4390389 is a wasteful number, since it uses less digits than its factorization.

4390389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1561 (or 1555 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 4390389 is about 2095.3255117046. The cubic root of 4390389 is about 163.7448565873.

The spelling of 4390389 in words is "four million, three hundred ninety thousand, three hundred eighty-nine".