868589144 has 8 divisors (see below), whose sum is σ = 1628604660. Its totient is φ = 434294568.

The previous prime is 868589131. The next prime is 868589167. The reversal of 868589144 is 441985868.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54286814 + ... + 54286829.

Almost surely, 2^868589144 is an apocalyptic number.

It is an amenable number.

868589144 is a deficient number, since it is larger than the sum of its proper divisors (760015516).

868589144 is a wasteful number, since it uses less digits than its factorization.

868589144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108573649 (or 108573645 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 53.

The square root of 868589144 is about 29471.8364544865. The cubic root of 868589144 is about 954.1239534393.

The spelling of 868589144 in words is "eight hundred sixty-eight million, five hundred eighty-nine thousand, one hundred forty-four".