440020001 has 4 divisors (see below), whose sum is σ = 440153904. Its totient is φ = 439886100.

The previous prime is 440019997. The next prime is 440020013. The reversal of 440020001 is 100020044.

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 440020001 - 2² = 440019997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440020051) 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, 61895 + ... + 68636.

It is an arithmetic number, because the mean of its divisors is an integer number (110038476).

Almost surely, 2^440020001 is an apocalyptic number.

It is an amenable number.

440020001 is a deficient number, since it is larger than the sum of its proper divisors (133903).

440020001 is a wasteful number, since it uses less digits than its factorization.

440020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133902.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 440020001 is about 20976.6537131164. The cubic root of 440020001 is about 760.6020166522.

Adding to 440020001 its reverse (100020044), we get a palindrome (540040045).

The spelling of 440020001 in words is "four hundred forty million, twenty thousand, one".