860447889 has 72 divisors (see below), whose sum is σ = 1538197440. Its totient is φ = 460821312.

The previous prime is 860447867. The next prime is 860447891. The reversal of 860447889 is 988744068.

It is not a de Polignac number, because 860447889 - 2²⁰ = 859399313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (860447849) by changing a digit.

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 71 ways as a sum of consecutive naturals, for example, 862539 + ... + 863535.

Almost surely, 2^860447889 is an apocalyptic number.

It is an amenable number.

860447889 is a deficient number, since it is larger than the sum of its proper divisors (677749551).

860447889 is a wasteful number, since it uses less digits than its factorization.

860447889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 860447889 is about 29333.3920472897. The cubic root of 860447889 is about 951.1336011620.

The spelling of 860447889 in words is "eight hundred sixty million, four hundred forty-seven thousand, eight hundred eighty-nine".