997760 has 32 divisors (see below), whose sum is σ = 2386800. Its totient is φ = 398848.

The previous prime is 997751. The next prime is 997769. The reversal of 997760 is 67799.

It is an interprime number because it is at equal distance from previous prime (997751) and next prime (997769).

It is a tau number, because it is divible by the number of its divisors (32).

It is a nialpdrome in base 10.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140 + ... + 1419.

2⁹⁹⁷⁷⁶⁰ is an apocalyptic number.

It is an amenable number.

997760 is an abundant number, since it is smaller than the sum of its proper divisors (1389040).

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

997760 is a wasteful number, since it uses less digits than its factorization.

997760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 997760 is about 998.8793720966. The cubic root of 997760 is about 99.9252775127.

The spelling of 997760 in words is "nine hundred ninety-seven thousand, seven hundred sixty".