28319680 has 28 divisors (see below), whose sum is σ = 67437000. Its totient is φ = 11327744.

The previous prime is 28319663. The next prime is 28319701. The reversal of 28319680 is 8691382.

It is a congruent number.

It is an unprimeable number.

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, 43930 + ... + 44569.

Almost surely, 2^28319680 is an apocalyptic number.

28319680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28319680 is an abundant number, since it is smaller than the sum of its proper divisors (39117320).

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

28319680 is an equidigital number, since it uses as much as digits as its factorization.

28319680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88516 (or 88506 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28319680 is about 5321.6238123340. The cubic root of 28319680 is about 304.8101658442.

The spelling of 28319680 in words is "twenty-eight million, three hundred nineteen thousand, six hundred eighty".