28452178 has 4 divisors (see below), whose sum is σ = 42678270. Its totient is φ = 14226088.

The previous prime is 28452163. The next prime is 28452187. The reversal of 28452178 is 87125482.

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., 18636489 + 9815689 = 4317^2 + 3133^2 .

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, 7113043 + ... + 7113046.

Almost surely, 2^28452178 is an apocalyptic number.

28452178 is a deficient number, since it is larger than the sum of its proper divisors (14226092).

28452178 is a wasteful number, since it uses less digits than its factorization.

28452178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14226091.

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

The square root of 28452178 is about 5334.0583048932. The cubic root of 28452178 is about 305.2847935632.

The spelling of 28452178 in words is "twenty-eight million, four hundred fifty-two thousand, one hundred seventy-eight".