28260018 has 24 divisors (see below), whose sum is σ = 64832508. Its totient is φ = 8865792.

The previous prime is 28260017. The next prime is 28260041. The reversal of 28260018 is 81006282.

It can be written as a sum of positive squares in 2 ways, for example, as 26967249 + 1292769 = 5193^2 + 1137^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28259973 and 28260000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28260017) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45871 + ... + 46482.

Almost surely, 2^28260018 is an apocalyptic number.

28260018 is an abundant number, since it is smaller than the sum of its proper divisors (36572490).

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

28260018 is a wasteful number, since it uses less digits than its factorization.

28260018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92378 (or 92375 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28260018 is about 5316.0152369985. The cubic root of 28260018 is about 304.5959641559.

The spelling of 28260018 in words is "twenty-eight million, two hundred sixty thousand, eighteen".