28856080 has 80 divisors (see below), whose sum is σ = 74066688. Its totient is φ = 10454400.

The previous prime is 28856077. The next prime is 28856101. The reversal of 28856080 is 8065882.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106345 + ... + 106615.

Almost surely, 2^28856080 is an apocalyptic number.

28856080 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 28856080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37033344).

28856080 is an abundant number, since it is smaller than the sum of its proper divisors (45210608).

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

28856080 is a wasteful number, since it uses less digits than its factorization.

28856080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 28856080 is about 5371.7855504478. The cubic root of 28856080 is about 306.7226005935.

The spelling of 28856080 in words is "twenty-eight million, eight hundred fifty-six thousand, eighty".