42440323 has 4 divisors (see below), whose sum is σ = 43136128. Its totient is φ = 41744520.

The previous prime is 42440309. The next prime is 42440327. The reversal of 42440323 is 32304424.

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

It is a cyclic number.

It is not a de Polignac number, because 42440323 - 2⁵ = 42440291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42440294 and 42440303.

It is not an unprimeable number, because it can be changed into a prime (42440327) 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, 347811 + ... + 347932.

It is an arithmetic number, because the mean of its divisors is an integer number (10784032).

Almost surely, 2^42440323 is an apocalyptic number.

42440323 is a deficient number, since it is larger than the sum of its proper divisors (695805).

42440323 is an equidigital number, since it uses as much as digits as its factorization.

42440323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695804.

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

The square root of 42440323 is about 6514.6237803882. The cubic root of 42440323 is about 348.8131856242.

Adding to 42440323 its reverse (32304424), we get a palindrome (74744747).

The spelling of 42440323 in words is "forty-two million, four hundred forty thousand, three hundred twenty-three".