4390023 has 16 divisors (see below), whose sum is σ = 6435072. Its totient is φ = 2640000.

The previous prime is 4390021. The next prime is 4390039. The reversal of 4390023 is 3200934.

It is not a de Polignac number, because 4390023 - 2¹ = 4390021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4390021) 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, 4543 + ... + 5423.

It is an arithmetic number, because the mean of its divisors is an integer number (402192).

Almost surely, 2^4390023 is an apocalyptic number.

4390023 is a deficient number, since it is larger than the sum of its proper divisors (2045049).

4390023 is a wasteful number, since it uses less digits than its factorization.

4390023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 4390023 is about 2095.2381726190. The cubic root of 4390023 is about 163.7403063236.

Adding to 4390023 its reverse (3200934), we get a palindrome (7590957).

The spelling of 4390023 in words is "four million, three hundred ninety thousand, twenty-three".