4390 has 8 divisors (see below), whose sum is σ = 7920.
Its totient is φ = 1752.
The previous prime is 4373. The next prime is 4391. The reversal of 4390 is 934.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an Ulam number.
It is a house number.
It is a plaindrome in base 15 and base 16.
It is a nialpdrome in base 11.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (4391) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210 + ... + 229.
It is an arithmetic number, because the mean of its divisors is an integer number (990).
24390 is an apocalyptic number.
4390 is a deficient number, since it is larger than the sum of its proper divisors (3530).
4390 is a wasteful number, since it uses less digits than its factorization.
4390 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 446.
The product of its (nonzero) digits is 108, while the sum is 16.
The square root of 4390 is about 66.2570750939.
The cubic root of 4390 is about 16.3740020370.
The spelling of 4390 in words is "four thousand, three hundred ninety".