42444443 has 4 divisors (see below), whose sum is σ = 42555648. Its totient is φ = 42333240.

The previous prime is 42444421. The next prime is 42444473. The reversal of 42444443 is 34444424.

It is a happy number.

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 42444443 - 2⁶ = 42444379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42444403) 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, 55028 + ... + 55793.

It is an arithmetic number, because the mean of its divisors is an integer number (10638912).

Almost surely, 2^42444443 is an apocalyptic number.

42444443 is a deficient number, since it is larger than the sum of its proper divisors (111205).

42444443 is a wasteful number, since it uses less digits than its factorization.

42444443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111204.

The product of its digits is 24576, while the sum is 29.

The square root of 42444443 is about 6514.9399843744. The cubic root of 42444443 is about 348.8244725617.

Adding to 42444443 its reverse (34444424), we get a palindrome (76888867).

The spelling of 42444443 in words is "forty-two million, four hundred forty-four thousand, four hundred forty-three".