28860778387828 has 48 divisors (see below), whose sum is σ = 51285150907200. Its totient is φ = 14209237152000.

The previous prime is 28860778387783. The next prime is 28860778387829. The reversal of 28860778387828 is 82878387706882.

It is a Smith number, since the sum of its digits (82) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860778387829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 695973151 + ... + 696014617.

It is an arithmetic number, because the mean of its divisors is an integer number (1068440643900).

Almost surely, 2^{28860778387828} is an apocalyptic number.

It is an amenable number.

28860778387828 is a deficient number, since it is larger than the sum of its proper divisors (22424372519372).

28860778387828 is a wasteful number, since it uses less digits than its factorization.

28860778387828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49600 (or 49598 counting only the distinct ones).

The product of its (nonzero) digits is 6473908224, while the sum is 82.

The spelling of 28860778387828 in words is "twenty-eight trillion, eight hundred sixty billion, seven hundred seventy-eight million, three hundred eighty-seven thousand, eight hundred twenty-eight".