4402720609 has 9 divisors (see below), whose sum is σ = 5122072497. Its totient is φ = 3773362404.

The previous prime is 4402720607. The next prime is 4402720631. The reversal of 4402720609 is 9060272044.

The square root of 4402720609 is 66353.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 4402720609 - 2¹ = 4402720607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4402720607) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 459732 + ... + 469210.

Almost surely, 2^4402720609 is an apocalyptic number.

4402720609 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

4402720609 is the 66353-rd square number.

4402720609 is the 33177-th centered octagonal number.

It is an amenable number.

4402720609 is a deficient number, since it is larger than the sum of its proper divisors (719351888).

4402720609 is an frugal number, since it uses more digits than its factorization.

4402720609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18972 (or 9486 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The cubic root of 4402720609 is about 1638.9802068918.

The spelling of 4402720609 in words is "four billion, four hundred two million, seven hundred twenty thousand, six hundred nine".