28019375812 has 6 divisors (see below), whose sum is σ = 49033907678. Its totient is φ = 14009687904.

The previous prime is 28019375801. The next prime is 28019375849. The reversal of 28019375812 is 21857391082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 26110035396 + 1909340416 = 161586^2 + 43696^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3502421973 + ... + 3502421980.

Almost surely, 2^28019375812 is an apocalyptic number.

It is an amenable number.

28019375812 is a deficient number, since it is larger than the sum of its proper divisors (21014531866).

28019375812 is a wasteful number, since it uses less digits than its factorization.

28019375812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004843957 (or 7004843955 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 28019375812 in words is "twenty-eight billion, nineteen million, three hundred seventy-five thousand, eight hundred twelve".