1687080 has 64 divisors (see below), whose sum is σ = 5365440. Its totient is φ = 422912.

The previous prime is 1687061. The next prime is 1687087. The reversal of 1687080 is 807861.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (1687087) by changing a digit.

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, 1627 + ... + 2453.

It is an arithmetic number, because the mean of its divisors is an integer number (83835).

2^1687080 is an apocalyptic number.

1687080 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 1687080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2682720).

1687080 is an abundant number, since it is smaller than the sum of its proper divisors (3678360).

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

1687080 is a wasteful number, since it uses less digits than its factorization.

1687080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 854 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 1687080 is about 1298.8764375413. The cubic root of 1687080 is about 119.0452009160.

The spelling of 1687080 in words is "one million, six hundred eighty-seven thousand, eighty".