440104421 has 4 divisors (see below), whose sum is σ = 448408332. Its totient is φ = 431800512.

The previous prime is 440104409. The next prime is 440104451. The reversal of 440104421 is 124401044.

It is a happy number.

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 255552196 + 184552225 = 15986^2 + 13585^2 .

It is a cyclic number.

It is not a de Polignac number, because 440104421 - 2¹⁰ = 440103397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440104393 and 440104402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440104451) 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, 4151876 + ... + 4151981.

It is an arithmetic number, because the mean of its divisors is an integer number (112102083).

Almost surely, 2^440104421 is an apocalyptic number.

It is an amenable number.

440104421 is a deficient number, since it is larger than the sum of its proper divisors (8303911).

440104421 is an equidigital number, since it uses as much as digits as its factorization.

440104421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8303910.

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 440104421 is about 20978.6658536714. The cubic root of 440104421 is about 760.6506552870.

Adding to 440104421 its reverse (124401044), we get a palindrome (564505465).

The spelling of 440104421 in words is "four hundred forty million, one hundred four thousand, four hundred twenty-one".