42644323 has 4 divisors (see below), whose sum is σ = 44498448. Its totient is φ = 40790200.

The previous prime is 42644293. The next prime is 42644333. The reversal of 42644323 is 32344624.

42644323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42644323 - 2²⁵ = 9089891 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42644291 and 42644300.

It is not an unprimeable number, because it can be changed into a prime (42644333) 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 3 ways as a sum of consecutive naturals, for example, 927028 + ... + 927073.

It is an arithmetic number, because the mean of its divisors is an integer number (11124612).

Almost surely, 2^42644323 is an apocalyptic number.

42644323 is a deficient number, since it is larger than the sum of its proper divisors (1854125).

42644323 is a wasteful number, since it uses less digits than its factorization.

42644323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854124.

The product of its digits is 13824, while the sum is 28.

The square root of 42644323 is about 6530.2620927494. The cubic root of 42644323 is about 349.3711783978.

Adding to 42644323 its reverse (32344624), we get a palindrome (74988947).

The spelling of 42644323 in words is "forty-two million, six hundred forty-four thousand, three hundred twenty-three".