1797680 has 40 divisors (see below), whose sum is σ = 4365792. Its totient is φ = 687104.

The previous prime is 1797673. The next prime is 1797751. The reversal of 1797680 is 867971.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 1352 + ... + 2328.

2^1797680 is an apocalyptic number.

1797680 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 1797680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182896).

1797680 is an abundant number, since it is smaller than the sum of its proper divisors (2568112).

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

1797680 is a wasteful number, since it uses less digits than its factorization.

1797680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 1797680 is about 1340.7758947714. The cubic root of 1797680 is about 121.5917555583.

The spelling of 1797680 in words is "one million, seven hundred ninety-seven thousand, six hundred eighty".