1028680 has 16 divisors (see below), whose sum is σ = 2314620. Its totient is φ = 411456.

The previous prime is 1028669. The next prime is 1028681. The reversal of 1028680 is 868201.

1028680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 484 = 1014^2 + 22^2 .

It is not an unprimeable number, because it can be changed into a prime (1028681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12819 + ... + 12898.

2^1028680 is an apocalyptic number.

1028680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1028680 is an abundant number, since it is smaller than the sum of its proper divisors (1285940).

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

1028680 is a wasteful number, since it uses less digits than its factorization.

1028680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25728 (or 25724 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1028680 is about 1014.2386306979. The cubic root of 1028680 is about 100.9470035335.

The spelling of 1028680 in words is "one million, twenty-eight thousand, six hundred eighty".