28036880 has 40 divisors (see below), whose sum is σ = 65875992. Its totient is φ = 11096064.

The previous prime is 28036867. The next prime is 28036919. The reversal of 28036880 is 8863082.

It can be written as a sum of positive squares in 4 ways, for example, as 200704 + 27836176 = 448^2 + 5276^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 28036880.

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, 5954 + ... + 9566.

Almost surely, 2^28036880 is an apocalyptic number.

28036880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28036880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32937996).

28036880 is an abundant number, since it is smaller than the sum of its proper divisors (37839112).

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

28036880 is a wasteful number, since it uses less digits than its factorization.

28036880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3723 (or 3717 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28036880 is about 5294.9863078199. The cubic root of 28036880 is about 303.7921594120.

The spelling of 28036880 in words is "twenty-eight million, thirty-six thousand, eight hundred eighty".