297978 has 8 divisors (see below), whose sum is σ = 595968. Its totient is φ = 99324.

The previous prime is 297971. The next prime is 297989. The reversal of 297978 is 879792.

It is a sphenic number, since it is the product of 3 distinct primes.

297978 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (297971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24826 + ... + 24837.

It is an arithmetic number, because the mean of its divisors is an integer number (74496).

2²⁹⁷⁹⁷⁸ is an apocalyptic number.

297978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

297978 is a wasteful number, since it uses less digits than its factorization.

297978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49668.

The product of its digits is 63504, while the sum is 42.

The square root of 297978 is about 545.8736117454. The cubic root of 297978 is about 66.7925565708.

It can be divided in two parts, 297 and 978, that added together give a triangular number (1275 = T₅₀).

The spelling of 297978 in words is "two hundred ninety-seven thousand, nine hundred seventy-eight".