440071 has 4 divisors (see below), whose sum is σ = 443032. Its totient is φ = 437112.

The previous prime is 440047. The next prime is 440087. The reversal of 440071 is 170044.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 440071 - 2⁵ = 440039 is a prime.

It is a Duffinian number.

440071 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440171) 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, 1245 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (110758).

2⁴⁴⁰⁰⁷¹ is an apocalyptic number.

440071 is a deficient number, since it is larger than the sum of its proper divisors (2961).

440071 is a wasteful number, since it uses less digits than its factorization.

440071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 440071 is about 663.3784741759. The cubic root of 440071 is about 76.0631400501.

The spelling of 440071 in words is "four hundred forty thousand, seventy-one", and thus it is an iban number.