28068178 has 4 divisors (see below), whose sum is σ = 42102270. Its totient is φ = 14034088.

The previous prime is 28068169. The next prime is 28068181. The reversal of 28068178 is 87186082.

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., 18722929 + 9345249 = 4327^2 + 3057^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28068178.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7017043 + ... + 7017046.

Almost surely, 2^28068178 is an apocalyptic number.

28068178 is a deficient number, since it is larger than the sum of its proper divisors (14034092).

28068178 is a wasteful number, since it uses less digits than its factorization.

28068178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14034091.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 28068178 is about 5297.9409207729. The cubic root of 28068178 is about 303.9051599931.

The spelling of 28068178 in words is "twenty-eight million, sixty-eight thousand, one hundred seventy-eight".