1797920 has 48 divisors (see below), whose sum is σ = 4504248. Its totient is φ = 675840.

The previous prime is 1797911. The next prime is 1797947. The reversal of 1797920 is 297971.

It can be written as a sum of positive squares in 4 ways, for example, as 1752976 + 44944 = 1324^2 + 212^2 .

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, 2390 + ... + 3050.

2^1797920 is an apocalyptic number.

1797920 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 1797920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2252124).

1797920 is an abundant number, since it is smaller than the sum of its proper divisors (2706328).

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

1797920 is a wasteful number, since it uses less digits than its factorization.

1797920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 1797920 is about 1340.8653922001. The cubic root of 1797920 is about 121.5971663698.

The spelling of 1797920 in words is "one million, seven hundred ninety-seven thousand, nine hundred twenty".