28520118 has 96 divisors (see below), whose sum is σ = 73625760. Its totient is φ = 7879680.

The previous prime is 28520111. The next prime is 28520119. The reversal of 28520118 is 81102582.

28520118 is a `hidden beast` number, since 28 + 520 + 118 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28520091 and 28520100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28520111) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 124428 + ... + 124656.

It is an arithmetic number, because the mean of its divisors is an integer number (766935).

Almost surely, 2^28520118 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28520118, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36812880).

28520118 is an abundant number, since it is smaller than the sum of its proper divisors (45105642).

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

28520118 is a wasteful number, since it uses less digits than its factorization.

28520118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 28520118 is about 5340.4230169529. The cubic root of 28520118 is about 305.5275935086.

The spelling of 28520118 in words is "twenty-eight million, five hundred twenty thousand, one hundred eighteen".