28000680 has 64 divisors (see below), whose sum is σ = 88430400. Its totient is φ = 7073280.

The previous prime is 28000613. The next prime is 28000691. The reversal of 28000680 is 8600082.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 28000680.

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 15 ways as a sum of consecutive naturals, for example, 3861 + ... + 8420.

It is an arithmetic number, because the mean of its divisors is an integer number (1381725).

Almost surely, 2^28000680 is an apocalyptic number.

28000680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28000680 is an abundant number, since it is smaller than the sum of its proper divisors (60429720).

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

28000680 is a wasteful number, since it uses less digits than its factorization.

28000680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12314 (or 12310 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 28000680 is about 5291.5668756995. The cubic root of 28000680 is about 303.6613553587.

It can be divided in two parts, 28000 and 680, that added together give a triangular number (28680 = T₂₃₉).

The spelling of 28000680 in words is "twenty-eight million, six hundred eighty", and thus it is an aban number.