297688 has 16 divisors (see below), whose sum is σ = 564480. Its totient is φ = 147168.

The previous prime is 297683. The next prime is 297691. The reversal of 297688 is 886792.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 297688.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (297683) by changing a digit.

297688 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870 + ... + 1162.

It is an arithmetic number, because the mean of its divisors is an integer number (35280).

2²⁹⁷⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

297688 is a deficient number, since it is larger than the sum of its proper divisors (266792).

297688 is a wasteful number, since it uses less digits than its factorization.

297688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 422 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 297688 is about 545.6079178311. The cubic root of 297688 is about 66.7708814487.

It can be divided in two parts, 29768 and 8, that multiplied together give a square (238144 = 488²).

The spelling of 297688 in words is "two hundred ninety-seven thousand, six hundred eighty-eight".