297920 has 84 divisors (see below), whose sum is σ = 868680. Its totient is φ = 96768.

The previous prime is 297911. The next prime is 297931. The reversal of 297920 is 29792.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

297920 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15671 + ... + 15689.

2²⁹⁷⁹²⁰ is an apocalyptic number.

297920 is a gapful number since it is divisible by the number (20) 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 297920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434340).

297920 is an abundant number, since it is smaller than the sum of its proper divisors (570760).

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

297920 is a wasteful number, since it uses less digits than its factorization.

297920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 297920 is about 545.8204833093. The cubic root of 297920 is about 66.7882226718.

The spelling of 297920 in words is "two hundred ninety-seven thousand, nine hundred twenty".