440020455 has 32 divisors (see below), whose sum is σ = 808462848. Its totient is φ = 200188800.

The previous prime is 440020397. The next prime is 440020459. The reversal of 440020455 is 554020044.

It is not a de Polignac number, because 440020455 - 2¹⁶ = 439954919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440020459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12225 + ... + 32085.

It is an arithmetic number, because the mean of its divisors is an integer number (25264464).

Almost surely, 2^440020455 is an apocalyptic number.

440020455 is a deficient number, since it is larger than the sum of its proper divisors (368442393).

440020455 is a wasteful number, since it uses less digits than its factorization.

440020455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20087.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 440020455 is about 20976.6645346680. The cubic root of 440020455 is about 760.6022782412.

Adding to 440020455 its reverse (554020044), we get a palindrome (994040499).

The spelling of 440020455 in words is "four hundred forty million, twenty thousand, four hundred fifty-five".