440291 has 4 divisors (see below), whose sum is σ = 443784. Its totient is φ = 436800.

The previous prime is 440281. The next prime is 440303. The reversal of 440291 is 192044.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 440291 - 2⁶ = 440227 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (440221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (110946).

2⁴⁴⁰²⁹¹ is an apocalyptic number.

440291 is a deficient number, since it is larger than the sum of its proper divisors (3493).

440291 is a wasteful number, since it uses less digits than its factorization.

440291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3492.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 440291 is about 663.5442713188. The cubic root of 440291 is about 76.0758130832.

The spelling of 440291 in words is "four hundred forty thousand, two hundred ninety-one".