4040423 has 4 divisors (see below), whose sum is σ = 4044480. Its totient is φ = 4036368.

The previous prime is 4040419. The next prime is 4040429. The reversal of 4040423 is 3240404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4040423 - 2² = 4040419 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040429) 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, 611 + ... + 2907.

It is an arithmetic number, because the mean of its divisors is an integer number (1011120).

Almost surely, 2^4040423 is an apocalyptic number.

4040423 is a deficient number, since it is larger than the sum of its proper divisors (4057).

4040423 is a wasteful number, since it uses less digits than its factorization.

4040423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 4040423 is about 2010.0803466528. The cubic root of 4040423 is about 159.2730432347.

Adding to 4040423 its reverse (3240404), we get a palindrome (7280827).

The spelling of 4040423 in words is "four million, forty thousand, four hundred twenty-three".