28105876 has 24 divisors (see below), whose sum is σ = 50405544. Its totient is φ = 13708800.

The previous prime is 28105873. The next prime is 28105907. The reversal of 28105876 is 67850182.

It can be written as a sum of positive squares in 4 ways, for example, as 11048976 + 17056900 = 3324^2 + 4130^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28105873) by changing a digit.

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, 29016 + ... + 29968.

It is an arithmetic number, because the mean of its divisors is an integer number (2100231).

Almost surely, 2^28105876 is an apocalyptic number.

It is an amenable number.

28105876 is a deficient number, since it is larger than the sum of its proper divisors (22299668).

28105876 is a wasteful number, since it uses less digits than its factorization.

28105876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 28105876 is about 5301.4975242850. The cubic root of 28105876 is about 304.0411561315.

The spelling of 28105876 in words is "twenty-eight million, one hundred five thousand, eight hundred seventy-six".