4090023 has 12 divisors (see below), whose sum is σ = 6751888. Its totient is φ = 2337120.

The previous prime is 4090019. The next prime is 4090033. The reversal of 4090023 is 3200904.

It is not a de Polignac number, because 4090023 - 2² = 4090019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4089978 and 4090005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090003) 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 11 ways as a sum of consecutive naturals, for example, 32398 + ... + 32523.

Almost surely, 2^4090023 is an apocalyptic number.

4090023 is a deficient number, since it is larger than the sum of its proper divisors (2661865).

4090023 is a wasteful number, since it uses less digits than its factorization.

4090023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64934 (or 64931 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 4090023 is about 2022.3805279917. The cubic root of 4090023 is about 159.9221365934.

Adding to 4090023 its reverse (3200904), we get a palindrome (7290927).

The spelling of 4090023 in words is "four million, ninety thousand, twenty-three".