4400452721 has 32 divisors (see below), whose sum is σ = 5299084800. Its totient is φ = 3574771200.

The previous prime is 4400452717. The next prime is 4400452723. The reversal of 4400452721 is 1272540044.

It is not a de Polignac number, because 4400452721 - 2² = 4400452717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4400452723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2727311 + ... + 2728923.

It is an arithmetic number, because the mean of its divisors is an integer number (165596400).

Almost surely, 2^4400452721 is an apocalyptic number.

It is an amenable number.

4400452721 is a deficient number, since it is larger than the sum of its proper divisors (898632079).

4400452721 is a wasteful number, since it uses less digits than its factorization.

4400452721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 4400452721 is about 66335.9082322689. The cubic root of 4400452721 is about 1638.6987398716.

Adding to 4400452721 its reverse (1272540044), we get a palindrome (5672992765).

The spelling of 4400452721 in words is "four billion, four hundred million, four hundred fifty-two thousand, seven hundred twenty-one".