404042323 has 4 divisors (see below), whose sum is σ = 407965168. Its totient is φ = 400119480.

The previous prime is 404042299. The next prime is 404042339. The reversal of 404042323 is 323240404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404042323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 404042294 and 404042303.

It is not an unprimeable number, because it can be changed into a prime (404040323) 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, 1961268 + ... + 1961473.

It is an arithmetic number, because the mean of its divisors is an integer number (101991292).

Almost surely, 2^404042323 is an apocalyptic number.

404042323 is a deficient number, since it is larger than the sum of its proper divisors (3922845).

404042323 is a wasteful number, since it uses less digits than its factorization.

404042323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3922844.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 404042323 is about 20100.8040386448. The cubic root of 404042323 is about 739.2799930015.

Adding to 404042323 its reverse (323240404), we get a palindrome (727282727).

The spelling of 404042323 in words is "four hundred four million, forty-two thousand, three hundred twenty-three".