28184242 has 4 divisors (see below), whose sum is σ = 42276366. Its totient is φ = 14092120.

The previous prime is 28184237. The next prime is 28184243. The reversal of 28184242 is 24248182.

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., 25290841 + 2893401 = 5029^2 + 1701^2 .

It is a super-2 number, since 2×28184242² = 1588702994229128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28184243) 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, 7046059 + ... + 7046062.

Almost surely, 2^28184242 is an apocalyptic number.

28184242 is a deficient number, since it is larger than the sum of its proper divisors (14092124).

28184242 is a wasteful number, since it uses less digits than its factorization.

28184242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14092123.

The product of its digits is 8192, while the sum is 31.

The square root of 28184242 is about 5308.8833100757. The cubic root of 28184242 is about 304.3234740687.

The spelling of 28184242 in words is "twenty-eight million, one hundred eighty-four thousand, two hundred forty-two".