297990 has 96 divisors (see below), whose sum is σ = 988416. Its totient is φ = 60480.

The previous prime is 297989. The next prime is 297991. The reversal of 297990 is 99792.

It is an interprime number because it is at equal distance from previous prime (297989) and next prime (297991).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6909 + ... + 6951.

It is an arithmetic number, because the mean of its divisors is an integer number (10296).

2²⁹⁷⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 297990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494208).

297990 is an abundant number, since it is smaller than the sum of its proper divisors (690426).

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

297990 is a wasteful number, since it uses less digits than its factorization.

297990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 297990 is about 545.8846031901. The cubic root of 297990 is about 66.7934531693.

The spelling of 297990 in words is "two hundred ninety-seven thousand, nine hundred ninety".