28808960 has 72 divisors (see below), whose sum is σ = 70199136. Its totient is φ = 11325440.

The previous prime is 28808957. The next prime is 28808971. The reversal of 28808960 is 6980882.

It is a happy number.

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, 90722 + ... + 91038.

It is an arithmetic number, because the mean of its divisors is an integer number (974988).

Almost surely, 2^28808960 is an apocalyptic number.

28808960 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 28808960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35099568).

28808960 is an abundant number, since it is smaller than the sum of its proper divisors (41390176).

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

28808960 is an equidigital number, since it uses as much as digits as its factorization.

28808960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 28808960 is about 5367.3978797924. The cubic root of 28808960 is about 306.5555573120. Note that the first 5 decimals are identical.

The spelling of 28808960 in words is "twenty-eight million, eight hundred eight thousand, nine hundred sixty".