28183874 has 4 divisors (see below), whose sum is σ = 42275814. Its totient is φ = 14091936.

The previous prime is 28183871. The next prime is 28183889. The reversal of 28183874 is 47838182.

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., 26061025 + 2122849 = 5105^2 + 1457^2 .

It is not an unprimeable number, because it can be changed into a prime (28183871) by changing a digit.

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, 7045967 + ... + 7045970.

Almost surely, 2^28183874 is an apocalyptic number.

28183874 is a deficient number, since it is larger than the sum of its proper divisors (14091940).

28183874 is a wasteful number, since it uses less digits than its factorization.

28183874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14091939.

The product of its digits is 86016, while the sum is 41.

The square root of 28183874 is about 5308.8486510730. The cubic root of 28183874 is about 304.3221495517.

The spelling of 28183874 in words is "twenty-eight million, one hundred eighty-three thousand, eight hundred seventy-four".