28360880 has 40 divisors (see below), whose sum is σ = 66257664. Its totient is φ = 11289600.

The previous prime is 28360873. The next prime is 28360903. The reversal of 28360880 is 8806382.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 28360880.

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, 18545 + ... + 20015.

Almost surely, 2^28360880 is an apocalyptic number.

28360880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28360880 is an abundant number, since it is smaller than the sum of its proper divisors (37896784).

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

28360880 is a wasteful number, since it uses less digits than its factorization.

28360880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28360880 is about 5325.4934043711. The cubic root of 28360880 is about 304.9579087306.

The spelling of 28360880 in words is "twenty-eight million, three hundred sixty thousand, eight hundred eighty".