440913 has 16 divisors (see below), whose sum is σ = 663552. Its totient is φ = 258000.

The previous prime is 440911. The next prime is 440939. The reversal of 440913 is 319044.

It is not a de Polignac number, because 440913 - 2¹ = 440911 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 440913.

It is not an unprimeable number, because it can be changed into a prime (440911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 808 + ... + 1238.

It is an arithmetic number, because the mean of its divisors is an integer number (41472).

2⁴⁴⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

440913 is a deficient number, since it is larger than the sum of its proper divisors (222639).

440913 is a wasteful number, since it uses less digits than its factorization.

440913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 440913 is about 664.0128010814. The cubic root of 440913 is about 76.1116203793. Note that the first 3 decimals are identical.

Adding to 440913 its reverse (319044), we get a palindrome (759957).

The spelling of 440913 in words is "four hundred forty thousand, nine hundred thirteen".