28784900860 has 24 divisors (see below), whose sum is σ = 60465753936. Its totient is φ = 11510634240.

The previous prime is 28784900827. The next prime is 28784900897. The reversal of 28784900860 is 6800948782.

It is a junction number, because it is equal to n+sod(n) for n = 28784900798 and 28784900807.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136317 + ... + 275956.

It is an arithmetic number, because the mean of its divisors is an integer number (2519406414).

Almost surely, 2^28784900860 is an apocalyptic number.

28784900860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28784900860 is an abundant number, since it is smaller than the sum of its proper divisors (31680853076).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28784900860 is a wasteful number, since it uses less digits than its factorization.

28784900860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415773 (or 415771 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The spelling of 28784900860 in words is "twenty-eight billion, seven hundred eighty-four million, nine hundred thousand, eight hundred sixty".