28342018 has 4 divisors (see below), whose sum is σ = 42513030. Its totient is φ = 14171008.

The previous prime is 28341997. The next prime is 28342021. The reversal of 28342018 is 81024382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81024382 = 2 ⋅40512191.

It can be written as a sum of positive squares in only one way, i.e., 27426169 + 915849 = 5237^2 + 957^2 .

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, 7085503 + ... + 7085506.

Almost surely, 2^28342018 is an apocalyptic number.

28342018 is a deficient number, since it is larger than the sum of its proper divisors (14171012).

28342018 is a wasteful number, since it uses less digits than its factorization.

28342018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14171011.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28342018 is about 5323.7221941044. The cubic root of 28342018 is about 304.8902875128.

The spelling of 28342018 in words is "twenty-eight million, three hundred forty-two thousand, eighteen".