28880760 has 128 divisors (see below), whose sum is σ = 93312000. Its totient is φ = 7128576.

The previous prime is 28880759. The next prime is 28880777. The reversal of 28880760 is 6708882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120721 + ... + 120959.

It is an arithmetic number, because the mean of its divisors is an integer number (729000).

Almost surely, 2^28880760 is an apocalyptic number.

28880760 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 28880760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46656000).

28880760 is an abundant number, since it is smaller than the sum of its proper divisors (64431240).

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

28880760 is a wasteful number, since it uses less digits than its factorization.

28880760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 321 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 28880760 is about 5374.0822472307. The cubic root of 28880760 is about 306.8100201445.

The spelling of 28880760 in words is "twenty-eight million, eight hundred eighty thousand, seven hundred sixty".