28871587286 has 4 divisors (see below), whose sum is σ = 43307380932. Its totient is φ = 14435793642.

The previous prime is 28871587259. The next prime is 28871587331. The reversal of 28871587286 is 68278517882.

It is a semiprime because it is the product of two primes.

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, 7217896820 + ... + 7217896823.

It is an arithmetic number, because the mean of its divisors is an integer number (10826845233).

Almost surely, 2^28871587286 is an apocalyptic number.

28871587286 is a deficient number, since it is larger than the sum of its proper divisors (14435793646).

28871587286 is a wasteful number, since it uses less digits than its factorization.

28871587286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14435793645.

The product of its digits is 24084480, while the sum is 62.

The spelling of 28871587286 in words is "twenty-eight billion, eight hundred seventy-one million, five hundred eighty-seven thousand, two hundred eighty-six".