28445018 has 16 divisors (see below), whose sum is σ = 48851520. Its totient is φ = 12168576.

The previous prime is 28445009. The next prime is 28445041. The reversal of 28445018 is 81054482.

It is a happy number.

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 in 7 ways as a sum of consecutive naturals, for example, 7913 + ... + 10931.

It is an arithmetic number, because the mean of its divisors is an integer number (3053220).

Almost surely, 2^28445018 is an apocalyptic number.

28445018 is a deficient number, since it is larger than the sum of its proper divisors (20406502).

28445018 is a wasteful number, since it uses less digits than its factorization.

28445018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3701.

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 28445018 is about 5333.3871038956. The cubic root of 28445018 is about 305.2591830751.

The spelling of 28445018 in words is "twenty-eight million, four hundred forty-five thousand, eighteen".