28105260 has 24 divisors (see below), whose sum is σ = 78694896. Its totient is φ = 7494720.

The previous prime is 28105243. The next prime is 28105283. The reversal of 28105260 is 6250182.

It is a self number, because there is not a number n which added to its sum of digits gives 28105260.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234151 + ... + 234270.

It is an arithmetic number, because the mean of its divisors is an integer number (3278954).

Almost surely, 2^28105260 is an apocalyptic number.

28105260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28105260 is an abundant number, since it is smaller than the sum of its proper divisors (50589636).

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

28105260 is a wasteful number, since it uses less digits than its factorization.

28105260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468433 (or 468431 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28105260 is about 5301.4394271745. The cubic root of 28105260 is about 304.0389348793.

The spelling of 28105260 in words is "twenty-eight million, one hundred five thousand, two hundred sixty".