440020345 has 8 divisors (see below), whose sum is σ = 539259264. Its totient is φ = 344526384.

The previous prime is 440020331. The next prime is 440020349. The reversal of 440020345 is 543020044.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 440020345 - 2⁵ = 440020313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440020349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935979 + ... + 936448.

It is an arithmetic number, because the mean of its divisors is an integer number (67407408).

Almost surely, 2^440020345 is an apocalyptic number.

It is an amenable number.

440020345 is a deficient number, since it is larger than the sum of its proper divisors (99238919).

440020345 is a wasteful number, since it uses less digits than its factorization.

440020345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872479.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 440020345 is about 20976.6619127067. The cubic root of 440020345 is about 760.6022148607.

Adding to 440020345 its reverse (543020044), we get a palindrome (983040389).

The spelling of 440020345 in words is "four hundred forty million, twenty thousand, three hundred forty-five".