28019288018 has 8 divisors (see below), whose sum is σ = 42185174220. Its totient is φ = 13957563280.

The previous prime is 28019287981. The next prime is 28019288081. The reversal of 28019288018 is 81088291082.

It can be written as a sum of positive squares in 2 ways, for example, as 27934776769 + 84511249 = 167137^2 + 9193^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26039693 + ... + 26040768.

Almost surely, 2^28019288018 is an apocalyptic number.

28019288018 is a deficient number, since it is larger than the sum of its proper divisors (14165886202).

28019288018 is a wasteful number, since it uses less digits than its factorization.

28019288018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52080732.

The product of its (nonzero) digits is 147456, while the sum is 47.

The spelling of 28019288018 in words is "twenty-eight billion, nineteen million, two hundred eighty-eight thousand, eighteen".