28518945 has 64 divisors (see below), whose sum is σ = 59512320. Its totient is φ = 11317248.

The previous prime is 28518937. The next prime is 28518947. The reversal of 28518945 is 54981582.

It is a happy number.

It is not a de Polignac number, because 28518945 - 2³ = 28518937 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28518897 and 28518906.

It is not an unprimeable number, because it can be changed into a prime (28518947) 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 in 63 ways as a sum of consecutive naturals, for example, 22591 + ... + 23819.

It is an arithmetic number, because the mean of its divisors is an integer number (929880).

Almost surely, 2^28518945 is an apocalyptic number.

It is an amenable number.

28518945 is an abundant number, since it is smaller than the sum of its proper divisors (30993375).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28518945 is a wasteful number, since it uses less digits than its factorization.

28518945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274.

The product of its digits is 115200, while the sum is 42.

The square root of 28518945 is about 5340.3131930627. The cubic root of 28518945 is about 305.5234047837.

The spelling of 28518945 in words is "twenty-eight million, five hundred eighteen thousand, nine hundred forty-five".