440891 has 8 divisors (see below), whose sum is σ = 486000. Its totient is φ = 396640.

The previous prime is 440863. The next prime is 440893. The reversal of 440891 is 198044.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 440891 - 2¹⁰ = 439867 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 440891.

It is not an unprimeable number, because it can be changed into a prime (440893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1505 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (60750).

2⁴⁴⁰⁸⁹¹ is an apocalyptic number.

440891 is a deficient number, since it is larger than the sum of its proper divisors (45109).

440891 is a wasteful number, since it uses less digits than its factorization.

440891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 440891 is about 663.9962349291. The cubic root of 440891 is about 76.1103544580.

It can be divided in two parts, 440 and 891, that added together give a palindrome (1331).

The spelling of 440891 in words is "four hundred forty thousand, eight hundred ninety-one".