12928780436 has 48 divisors (see below), whose sum is σ = 26639551680. Its totient is φ = 5412683520.

The previous prime is 12928780391. The next prime is 12928780457. The reversal of 12928780436 is 63408782921.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 236675 + ... + 286133.

It is an arithmetic number, because the mean of its divisors is an integer number (554990660).

Almost surely, 2^12928780436 is an apocalyptic number.

It is an amenable number.

12928780436 is an abundant number, since it is smaller than the sum of its proper divisors (13710771244).

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

12928780436 is a wasteful number, since it uses less digits than its factorization.

12928780436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49944 (or 49942 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 50.

The spelling of 12928780436 in words is "twelve billion, nine hundred twenty-eight million, seven hundred eighty thousand, four hundred thirty-six".