440206641 has 18 divisors (see below), whose sum is σ = 739667682. Its totient is φ = 251546400.

The previous prime is 440206633. The next prime is 440206651. The reversal of 440206641 is 146602044.

It can be written as a sum of positive squares in only one way, i.e., 299428416 + 140778225 = 17304^2 + 11865^2 .

It is not a de Polignac number, because 440206641 - 2³ = 440206633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (440206601) 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 17 ways as a sum of consecutive naturals, for example, 498660 + ... + 499541.

It is an arithmetic number, because the mean of its divisors is an integer number (41092649).

Almost surely, 2^440206641 is an apocalyptic number.

It is an amenable number.

440206641 is a deficient number, since it is larger than the sum of its proper divisors (299461041).

440206641 is a wasteful number, since it uses less digits than its factorization.

440206641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998221 (or 998211 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 440206641 is about 20981.1019967970. The cubic root of 440206641 is about 760.7095410781.

Adding to 440206641 its reverse (146602044), we get a palindrome (586808685).

The spelling of 440206641 in words is "four hundred forty million, two hundred six thousand, six hundred forty-one".