28178888002 has 4 divisors (see below), whose sum is σ = 42268332006. Its totient is φ = 14089444000.

The previous prime is 28178887981. The next prime is 28178888041. The reversal of 28178888002 is 20088887182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27785222721 + 393665281 = 166689^2 + 19841^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7044721999 + ... + 7044722002.

Almost surely, 2^28178888002 is an apocalyptic number.

28178888002 is a deficient number, since it is larger than the sum of its proper divisors (14089444004).

28178888002 is a wasteful number, since it uses less digits than its factorization.

28178888002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14089444003.

The product of its (nonzero) digits is 917504, while the sum is 52.

The spelling of 28178888002 in words is "twenty-eight billion, one hundred seventy-eight million, eight hundred eighty-eight thousand, two".