4040823 has 16 divisors (see below), whose sum is σ = 5571072. Its totient is φ = 2604000.

The previous prime is 4040797. The next prime is 4040833. The reversal of 4040823 is 3280404.

It is a happy number.

It is not a de Polignac number, because 4040823 - 2¹⁸ = 3778679 is a prime.

4040823 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4040823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040833) 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, 12838 + ... + 13148.

It is an arithmetic number, because the mean of its divisors is an integer number (348192).

Almost surely, 2^4040823 is an apocalyptic number.

4040823 is a deficient number, since it is larger than the sum of its proper divisors (1530249).

4040823 is a wasteful number, since it uses less digits than its factorization.

4040823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4040823 is about 2010.1798427006. The cubic root of 4040823 is about 159.2782990470.

The spelling of 4040823 in words is "four million, forty thousand, eight hundred twenty-three".