28078068352 has 16 divisors (see below), whose sum is σ = 55936777050. Its totient is φ = 14039034112.

The previous prime is 28078068281. The next prime is 28078068407. The reversal of 28078068352 is 25386087082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27510866496 + 567201856 = 165864^2 + 23816^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28078068296 and 28078068305.

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 as a sum of consecutive naturals, namely, 109679827 + ... + 109680082.

Almost surely, 2^28078068352 is an apocalyptic number.

It is an amenable number.

28078068352 is a deficient number, since it is larger than the sum of its proper divisors (27858708698).

28078068352 is an equidigital number, since it uses as much as digits as its factorization.

28078068352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219359923 (or 219359911 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 28078068352 in words is "twenty-eight billion, seventy-eight million, sixty-eight thousand, three hundred fifty-two".