440622081 has 9 divisors (see below), whose sum is σ = 636545091. Its totient is φ = 293706072.

The previous prime is 440622079. The next prime is 440622137. The reversal of 440622081 is 180226044.

The square root of 440622081 is 20991.

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

It can be written as a sum of positive squares in only one way, i.e., 140778225 + 299843856 = 11865^2 + 17316^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 440622081 - 2¹ = 440622079 is a prime.

It is a super-2 number, since 2×440622081² = 388295636529541122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (440622071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59475 + ... + 66471.

Almost surely, 2^440622081 is an apocalyptic number.

440622081 is the 20991-st square number.

440622081 is the 10496-th centered octagonal number.

It is an amenable number.

440622081 is a deficient number, since it is larger than the sum of its proper divisors (195923010).

440622081 is an frugal number, since it uses more digits than its factorization.

440622081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14000 (or 7000 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The cubic root of 440622081 is about 760.9487694905.

It can be divided in two parts, 440 and 622081, that added together give a square (622521 = 789²).

The spelling of 440622081 in words is "four hundred forty million, six hundred twenty-two thousand, eighty-one".