440909091 has 24 divisors (see below), whose sum is σ = 729630720. Its totient is φ = 251331696.

The previous prime is 440909089. The next prime is 440909099. The reversal of 440909091 is 190909044.

It is not a de Polignac number, because 440909091 - 2¹ = 440909089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (440909099) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18046 + ... + 34748.

It is an arithmetic number, because the mean of its divisors is an integer number (30401280).

Almost surely, 2^440909091 is an apocalyptic number.

440909091 is a deficient number, since it is larger than the sum of its proper divisors (288721629).

440909091 is a wasteful number, since it uses less digits than its factorization.

440909091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17135 (or 17132 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 440909091 is about 20997.8353884394. The cubic root of 440909091 is about 761.1139545117.

The spelling of 440909091 in words is "four hundred forty million, nine hundred nine thousand, ninety-one".