28608880 has 20 divisors (see below), whose sum is σ = 66515832. Its totient is φ = 11443520.

The previous prime is 28608871. The next prime is 28608883. The reversal of 28608880 is 8880682.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608883) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 178726 + ... + 178885.

Almost surely, 2^28608880 is an apocalyptic number.

28608880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28608880 is an abundant number, since it is smaller than the sum of its proper divisors (37906952).

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

28608880 is a wasteful number, since it uses less digits than its factorization.

28608880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357624 (or 357618 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 28608880 is about 5348.7269513409. The cubic root of 28608880 is about 305.8442256109.

The spelling of 28608880 in words is "twenty-eight million, six hundred eight thousand, eight hundred eighty".