28935680 has 80 divisors (see below), whose sum is σ = 70709760. Its totient is φ = 11354112.

The previous prime is 28935661. The next prime is 28935701. The reversal of 28935680 is 8653982.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227777 + ... + 227903.

It is an arithmetic number, because the mean of its divisors is an integer number (883872).

Almost surely, 2^28935680 is an apocalyptic number.

28935680 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 28935680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35354880).

28935680 is an abundant number, since it is smaller than the sum of its proper divisors (41774080).

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

28935680 is an equidigital number, since it uses as much as digits as its factorization.

28935680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 223 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28935680 is about 5379.1895300315. The cubic root of 28935680 is about 307.0043748736.

The spelling of 28935680 in words is "twenty-eight million, nine hundred thirty-five thousand, six hundred eighty".