444021023 has 4 divisors (see below), whose sum is σ = 444415440. Its totient is φ = 443626608.

The previous prime is 444020999. The next prime is 444021037. The reversal of 444021023 is 320120444.

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 444021023 - 2⁶ = 444020959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 444020986 and 444021004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444021323) 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, 195515 + ... + 197772.

It is an arithmetic number, because the mean of its divisors is an integer number (111103860).

Almost surely, 2^444021023 is an apocalyptic number.

444021023 is a deficient number, since it is larger than the sum of its proper divisors (394417).

444021023 is a wasteful number, since it uses less digits than its factorization.

444021023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394416.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 444021023 is about 21071.8063535142. The cubic root of 444021023 is about 762.9004030875.

Adding to 444021023 its reverse (320120444), we get a palindrome (764141467).

The spelling of 444021023 in words is "four hundred forty-four million, twenty-one thousand, twenty-three".