440729 has 4 divisors (see below), whose sum is σ = 444084. Its totient is φ = 437376.

The previous prime is 440723. The next prime is 440731. The reversal of 440729 is 927044.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 336400 + 104329 = 580^2 + 323^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 440698 and 440707.

It is not an unprimeable number, because it can be changed into a prime (440723) 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 3 ways as a sum of consecutive naturals, for example, 1472 + ... + 1745.

It is an arithmetic number, because the mean of its divisors is an integer number (111021).

2⁴⁴⁰⁷²⁹ is an apocalyptic number.

It is an amenable number.

440729 is a deficient number, since it is larger than the sum of its proper divisors (3355).

440729 is a wasteful number, since it uses less digits than its factorization.

440729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3354.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 440729 is about 663.8742350777. The cubic root of 440729 is about 76.1010313767.

The spelling of 440729 in words is "four hundred forty thousand, seven hundred twenty-nine".