28468178 has 4 divisors (see below), whose sum is σ = 42702270. Its totient is φ = 14234088.

The previous prime is 28468177. The next prime is 28468201. The reversal of 28468178 is 87186482.

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., 26759929 + 1708249 = 5173^2 + 1307^2 .

It is not an unprimeable number, because it can be changed into a prime (28468171) by changing a digit.

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, 7117043 + ... + 7117046.

Almost surely, 2^28468178 is an apocalyptic number.

28468178 is a deficient number, since it is larger than the sum of its proper divisors (14234092).

28468178 is a wasteful number, since it uses less digits than its factorization.

28468178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14234091.

The product of its digits is 172032, while the sum is 44.

The square root of 28468178 is about 5335.5578902304. The cubic root of 28468178 is about 305.3420081799.

The spelling of 28468178 in words is "twenty-eight million, four hundred sixty-eight thousand, one hundred seventy-eight".