440030023021 has 4 divisors (see below), whose sum is σ = 440035480732. Its totient is φ = 440024565312.

The previous prime is 440030022941. The next prime is 440030023033. The reversal of 440030023021 is 120320030044.

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

It can be written as a sum of positive squares in 2 ways, for example, as 396413788996 + 43616234025 = 629614^2 + 208845^2 .

It is a cyclic number.

It is not a de Polignac number, because 440030023021 - 2⁷ = 440030022893 is a prime.

It is a super-3 number, since 3×440030023021³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440030023021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440030023091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2606076 + ... + 2769781.

It is an arithmetic number, because the mean of its divisors is an integer number (110008870183).

Almost surely, 2^440030023021 is an apocalyptic number.

It is an amenable number.

440030023021 is a deficient number, since it is larger than the sum of its proper divisors (5457711).

440030023021 is an equidigital number, since it uses as much as digits as its factorization.

440030023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457710.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 440030023021 its reverse (120320030044), we get a palindrome (560350053065).

The spelling of 440030023021 in words is "four hundred forty billion, thirty million, twenty-three thousand, twenty-one".