28112158 has 4 divisors (see below), whose sum is σ = 42168240. Its totient is φ = 14056078.

The previous prime is 28112137. The next prime is 28112159. The reversal of 28112158 is 85121182.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28112159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7028038 + ... + 7028041.

It is an arithmetic number, because the mean of its divisors is an integer number (10542060).

Almost surely, 2^28112158 is an apocalyptic number.

28112158 is a deficient number, since it is larger than the sum of its proper divisors (14056082).

28112158 is a wasteful number, since it uses less digits than its factorization.

28112158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14056081.

The product of its digits is 1280, while the sum is 28.

The square root of 28112158 is about 5302.0899652873. The cubic root of 28112158 is about 304.0638067244.

The spelling of 28112158 in words is "twenty-eight million, one hundred twelve thousand, one hundred fifty-eight".