440868091 has 4 divisors (see below), whose sum is σ = 441206712. Its totient is φ = 440529472.

The previous prime is 440868083. The next prime is 440868133. The reversal of 440868091 is 190868044.

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 440868091 - 2³ = 440868083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440878091) 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 3 ways as a sum of consecutive naturals, for example, 167350 + ... + 169963.

It is an arithmetic number, because the mean of its divisors is an integer number (110301678).

Almost surely, 2^440868091 is an apocalyptic number.

440868091 is a deficient number, since it is larger than the sum of its proper divisors (338621).

440868091 is a wasteful number, since it uses less digits than its factorization.

440868091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338620.

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 440868091 is about 20996.8590746330. The cubic root of 440868091 is about 761.0903618633.

The spelling of 440868091 in words is "four hundred forty million, eight hundred sixty-eight thousand, ninety-one".