247998 has 8 divisors (see below), whose sum is σ = 496008. Its totient is φ = 82664.

The previous prime is 247997. The next prime is 247999. The reversal of 247998 is 899742.

It is an interprime number because it is at equal distance from previous prime (247997) and next prime (247999).

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

247998 is an admirable number.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 247998.

It is not an unprimeable number, because it can be changed into a prime (247991) 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, 20661 + ... + 20672.

It is an arithmetic number, because the mean of its divisors is an integer number (62001).

2²⁴⁷⁹⁹⁸ is an apocalyptic number.

247998 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.

247998 is a wasteful number, since it uses less digits than its factorization.

247998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41338.

The product of its digits is 36288, while the sum is 39.

The square root of 247998 is about 497.9939758672. The cubic root of 247998 is about 62.8274441559.

The spelling of 247998 in words is "two hundred forty-seven thousand, nine hundred ninety-eight".