1679680 has 56 divisors (see below), whose sum is σ = 4160520. Its totient is φ = 645120.

The previous prime is 1679669. The next prime is 1679681. The reversal of 1679680 is 869761.

It can be written as a sum of positive squares in 4 ways, for example, as 64 + 1679616 = 8^2 + 1296^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9190 + ... + 9370.

It is an arithmetic number, because the mean of its divisors is an integer number (74295).

2^1679680 is an apocalyptic number.

1679680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1679680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2080260).

1679680 is an abundant number, since it is smaller than the sum of its proper divisors (2480840).

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

1679680 is a wasteful number, since it uses less digits than its factorization.

1679680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1679680 is about 1296.0246911228. The cubic root of 1679680 is about 118.8708907386.

The spelling of 1679680 in words is "one million, six hundred seventy-nine thousand, six hundred eighty".