868519444 has 12 divisors (see below), whose sum is σ = 1636825204. Its totient is φ = 400855104.

The previous prime is 868519423. The next prime is 868519481. The reversal of 868519444 is 444915868.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 287709444 + 580810000 = 16962^2 + 24100^2 .

It is a congruent number.

It is an unprimeable number.

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, 8351097 + ... + 8351200.

Almost surely, 2^868519444 is an apocalyptic number.

It is an amenable number.

868519444 is a deficient number, since it is larger than the sum of its proper divisors (768305760).

868519444 is a wasteful number, since it uses less digits than its factorization.

868519444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16702314 (or 16702312 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 49.

The square root of 868519444 is about 29470.6539459171. The cubic root of 868519444 is about 954.0984315076.

The spelling of 868519444 in words is "eight hundred sixty-eight million, five hundred nineteen thousand, four hundred forty-four".