868009444 has 9 divisors (see below), whose sum is σ = 1519119651. Its totient is φ = 433975260.

The previous prime is 868009423. The next prime is 868009451. The reversal of 868009444 is 444900868.

It is a happy number.

The square root of 868009444 is 29462.

It is a perfect power (a square), and thus also a powerful 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 868009444.

It is an unprimeable number.

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 2 ways as a sum of consecutive naturals, for example, 51559 + ... + 66289.

Almost surely, 2^868009444 is an apocalyptic number.

868009444 is the 29462-nd square number.

It is an amenable number.

868009444 is a deficient number, since it is larger than the sum of its proper divisors (651110207).

868009444 is an frugal number, since it uses more digits than its factorization.

868009444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29466 (or 14733 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 43.

The cubic root of 868009444 is about 953.9116441046.

The spelling of 868009444 in words is "eight hundred sixty-eight million, nine thousand, four hundred forty-four".