28088168252258 has 4 divisors (see below), whose sum is σ = 42132252378390. Its totient is φ = 14044084126128.

The previous prime is 28088168252257. The next prime is 28088168252281. The reversal of 28088168252258 is 85225286188082.

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., 26799641324569 + 1288526927689 = 5176837^2 + 1135133^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28088168252194 and 28088168252203.

It is not an unprimeable number, because it can be changed into a prime (28088168252257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7022042063063 + ... + 7022042063066.

Almost surely, 2^{28088168252258} is an apocalyptic number.

28088168252258 is a deficient number, since it is larger than the sum of its proper divisors (14044084126132).

28088168252258 is a wasteful number, since it uses less digits than its factorization.

28088168252258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14044084126131.

The product of its (nonzero) digits is 78643200, while the sum is 65.

The spelling of 28088168252258 in words is "twenty-eight trillion, eighty-eight billion, one hundred sixty-eight million, two hundred fifty-two thousand, two hundred fifty-eight".