1797980 has 12 divisors (see below), whose sum is σ = 3775800. Its totient is φ = 719184.

The previous prime is 1797967. The next prime is 1798001. The reversal of 1797980 is 897971.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44930 + ... + 44969.

It is an arithmetic number, because the mean of its divisors is an integer number (314650).

2^1797980 is an apocalyptic number.

1797980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1797980 is an abundant number, since it is smaller than the sum of its proper divisors (1977820).

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

1797980 is a wasteful number, since it uses less digits than its factorization.

1797980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89908 (or 89906 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 1797980 is about 1340.8877656240. The cubic root of 1797980 is about 121.5985189974.

Subtracting from 1797980 its reverse (897971), we obtain a palindrome (900009).

The spelling of 1797980 in words is "one million, seven hundred ninety-seven thousand, nine hundred eighty".