28118545 has 32 divisors (see below), whose sum is σ = 42981120. Its totient is φ = 17176320.

The previous prime is 28118509. The next prime is 28118551. The reversal of 28118545 is 54581182.

It is not a de Polignac number, because 28118545 - 2⁹ = 28118033 is a prime.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 28118545.

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 31 ways as a sum of consecutive naturals, for example, 12130 + ... + 14260.

It is an arithmetic number, because the mean of its divisors is an integer number (1343160).

Almost surely, 2^28118545 is an apocalyptic number.

It is an amenable number.

28118545 is a deficient number, since it is larger than the sum of its proper divisors (14862575).

28118545 is a wasteful number, since it uses less digits than its factorization.

28118545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185.

The product of its digits is 12800, while the sum is 34.

The square root of 28118545 is about 5302.6922407396. The cubic root of 28118545 is about 304.0868324496.

The spelling of 28118545 in words is "twenty-eight million, one hundred eighteen thousand, five hundred forty-five".