28112080 has 20 divisors (see below), whose sum is σ = 65360772. Its totient is φ = 11244800.

The previous prime is 28112069. The next prime is 28112087. The reversal of 28112080 is 8021182.

It can be written as a sum of positive squares in 2 ways, for example, as 7354944 + 20757136 = 2712^2 + 4556^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28112087) 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 3 ways as a sum of consecutive naturals, for example, 175621 + ... + 175780.

Almost surely, 2^28112080 is an apocalyptic number.

28112080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28112080 is an abundant number, since it is smaller than the sum of its proper divisors (37248692).

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

28112080 is a wasteful number, since it uses less digits than its factorization.

28112080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351414 (or 351408 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 28112080 is about 5302.0826096922. The cubic root of 28112080 is about 304.0635255056.

The spelling of 28112080 in words is "twenty-eight million, one hundred twelve thousand, eighty".