440405128 has 16 divisors (see below), whose sum is σ = 874333980. Its totient is φ = 207249408.

The previous prime is 440405093. The next prime is 440405129. The reversal of 440405128 is 821504044.

It can be written as a sum of positive squares in 2 ways, for example, as 436726404 + 3678724 = 20898^2 + 1918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 440405096 and 440405105.

It is not an unprimeable number, because it can be changed into a prime (440405129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1619001 + ... + 1619272.

Almost surely, 2^440405128 is an apocalyptic number.

It is an amenable number.

440405128 is a deficient number, since it is larger than the sum of its proper divisors (433928852).

440405128 is a wasteful number, since it uses less digits than its factorization.

440405128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3238296 (or 3238292 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 440405128 is about 20985.8316013448. The cubic root of 440405128 is about 760.8238572898.

The spelling of 440405128 in words is "four hundred forty million, four hundred five thousand, one hundred twenty-eight".