440408 has 8 divisors (see below), whose sum is σ = 825780. Its totient is φ = 220200.

The previous prime is 440399. The next prime is 440431. The reversal of 440408 is 804044.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 440408.

It is a congruent number.

It is an unprimeable number.

440408 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27518 + ... + 27533.

2⁴⁴⁰⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

440408 is a deficient number, since it is larger than the sum of its proper divisors (385372).

440408 is a wasteful number, since it uses less digits than its factorization.

440408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55057 (or 55053 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 440408 is about 663.6324283819. The cubic root of 440408 is about 76.0825511132.

It can be divided in two parts, 440 and 408, that added together give a palindrome (848).

The spelling of 440408 in words is "four hundred forty thousand, four hundred eight".