4400001 has 24 divisors (see below), whose sum is σ = 6945120. Its totient is φ = 2776032.

The previous prime is 4399987. The next prime is 4400021. The reversal of 4400001 is 1000044.

It is not a de Polignac number, because 4400001 - 2⁷ = 4399873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (4400021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4141 + ... + 5093.

It is an arithmetic number, because the mean of its divisors is an integer number (289380).

Almost surely, 2^4400001 is an apocalyptic number.

It is an amenable number.

4400001 is a deficient number, since it is larger than the sum of its proper divisors (2545119).

4400001 is an equidigital number, since it uses as much as digits as its factorization.

4400001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 4400001 is about 2097.6179347059. The cubic root of 4400001 is about 163.8642665341.

Adding to 4400001 its reverse (1000044), we get a palindrome (5400045).

The spelling of 4400001 in words is "four million, four hundred thousand, one".