28681080 has 64 divisors (see below), whose sum is σ = 87523200. Its totient is φ = 7516800.

The previous prime is 28681073. The next prime is 28681097. The reversal of 28681080 is 8018682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5055 + ... + 9105.

It is an arithmetic number, because the mean of its divisors is an integer number (1367550).

Almost surely, 2^28681080 is an apocalyptic number.

28681080 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 28681080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43761600).

28681080 is an abundant number, since it is smaller than the sum of its proper divisors (58842120).

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

28681080 is a wasteful number, since it uses less digits than its factorization.

28681080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4124 (or 4120 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 28681080 is about 5355.4719679968. The cubic root of 28681080 is about 306.1012950135.

The spelling of 28681080 in words is "twenty-eight million, six hundred eighty-one thousand, eighty".