28260918 has 48 divisors (see below), whose sum is σ = 70377216. Its totient is φ = 8028720.

The previous prime is 28260901. The next prime is 28260949. The reversal of 28260918 is 81906282.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26055 + ... + 27117.

It is an arithmetic number, because the mean of its divisors is an integer number (1466192).

Almost surely, 2^28260918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28260918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35188608).

28260918 is an abundant number, since it is smaller than the sum of its proper divisors (42116298).

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

28260918 is a wasteful number, since it uses less digits than its factorization.

28260918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28260918 is about 5316.0998861948. The cubic root of 28260918 is about 304.5991976223.

The spelling of 28260918 in words is "twenty-eight million, two hundred sixty thousand, nine hundred eighteen".