28245178 has 8 divisors (see below), whose sum is σ = 45626868. Its totient is φ = 13036224.

The previous prime is 28245169. The next prime is 28245179. The reversal of 28245178 is 87154282.

It can be written as a sum of positive squares in 2 ways, for example, as 24176889 + 4068289 = 4917^2 + 2017^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28245179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543151 + ... + 543202.

Almost surely, 2^28245178 is an apocalyptic number.

28245178 is a deficient number, since it is larger than the sum of its proper divisors (17381690).

28245178 is a wasteful number, since it uses less digits than its factorization.

28245178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086368.

The product of its digits is 35840, while the sum is 37.

The square root of 28245178 is about 5314.6192714060. The cubic root of 28245178 is about 304.5426379861.

The spelling of 28245178 in words is "twenty-eight million, two hundred forty-five thousand, one hundred seventy-eight".