28787181862 has 4 divisors (see below), whose sum is σ = 43180772796. Its totient is φ = 14393590930.

The previous prime is 28787181781. The next prime is 28787181889. The reversal of 28787181862 is 26818178782.

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

It is a junction number, because it is equal to n+sod(n) for n = 28787181797 and 28787181806.

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, 7196795464 + ... + 7196795467.

It is an arithmetic number, because the mean of its divisors is an integer number (10795193199).

Almost surely, 2^28787181862 is an apocalyptic number.

28787181862 is a deficient number, since it is larger than the sum of its proper divisors (14393590934).

28787181862 is a wasteful number, since it uses less digits than its factorization.

28787181862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14393590933.

The product of its digits is 4816896, while the sum is 58.

The spelling of 28787181862 in words is "twenty-eight billion, seven hundred eighty-seven million, one hundred eighty-one thousand, eight hundred sixty-two".