28978933844 has 12 divisors (see below), whose sum is σ = 57957867744. Its totient is φ = 12419543064.

The previous prime is 28978933843. The next prime is 28978933847. The reversal of 28978933844 is 44833987982.

28978933844 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978933843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517480934 + ... + 517480989.

It is an arithmetic number, because the mean of its divisors is an integer number (4829822312).

Almost surely, 2^28978933844 is an apocalyptic number.

It is an amenable number.

28978933844 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28978933844 is a wasteful number, since it uses less digits than its factorization.

28978933844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034961934 (or 1034961932 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 65.

The spelling of 28978933844 in words is "twenty-eight billion, nine hundred seventy-eight million, nine hundred thirty-three thousand, eight hundred forty-four".