440520641 has 4 divisors (see below), whose sum is σ = 480567984. Its totient is φ = 400473300.

The previous prime is 440520599. The next prime is 440520721. The reversal of 440520641 is 146025044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 440520641 - 2²² = 436326337 is a prime.

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 440520641.

It is not an unprimeable number, because it can be changed into a prime (440520341) 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, 20023655 + ... + 20023676.

It is an arithmetic number, because the mean of its divisors is an integer number (120141996).

Almost surely, 2^440520641 is an apocalyptic number.

It is an amenable number.

440520641 is a deficient number, since it is larger than the sum of its proper divisors (40047343).

440520641 is a wasteful number, since it uses less digits than its factorization.

440520641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40047342.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 440520641 is about 20988.5835872743. The cubic root of 440520641 is about 760.8903698090.

Adding to 440520641 its reverse (146025044), we get a palindrome (586545685).

The spelling of 440520641 in words is "four hundred forty million, five hundred twenty thousand, six hundred forty-one".