12784009828 has 24 divisors (see below), whose sum is σ = 22479416064. Its totient is φ = 6361372800.

The previous prime is 12784009783. The next prime is 12784009841. The reversal of 12784009828 is 82890048721.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1053033 + ... + 1065103.

It is an arithmetic number, because the mean of its divisors is an integer number (936642336).

Almost surely, 2^12784009828 is an apocalyptic number.

It is an amenable number.

12784009828 is a deficient number, since it is larger than the sum of its proper divisors (9695406236).

12784009828 is a wasteful number, since it uses less digits than its factorization.

12784009828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13323 (or 13321 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 12784009828 in words is "twelve billion, seven hundred eighty-four million, nine thousand, eight hundred twenty-eight".