440866881 has 48 divisors (see below), whose sum is σ = 812832384. Its totient is φ = 232533504.

The previous prime is 440866873. The next prime is 440866897. The reversal of 440866881 is 188668044.

It is not a de Polignac number, because 440866881 - 2³ = 440866873 is a prime.

It is a super-2 number, since 2×440866881² = 388727213525336322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (440866871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12145 + ... + 32081.

It is an arithmetic number, because the mean of its divisors is an integer number (16934008).

Almost surely, 2^440866881 is an apocalyptic number.

It is an amenable number.

440866881 is a deficient number, since it is larger than the sum of its proper divisors (371965503).

440866881 is a wasteful number, since it uses less digits than its factorization.

440866881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19972 (or 19960 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The square root of 440866881 is about 20996.8302607798. The cubic root of 440866881 is about 761.0896655703.

It can be divided in two parts, 4408 and 66881, that added together give a square (71289 = 267²).

The spelling of 440866881 in words is "four hundred forty million, eight hundred sixty-six thousand, eight hundred eighty-one".