247984 has 20 divisors (see below), whose sum is σ = 524520. Its totient is φ = 112640.

The previous prime is 247957. The next prime is 247991. The reversal of 247984 is 489742.

It is a happy number.

It is a super-2 number, since 2×247984² = 122992128512, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

247984 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, 529 + ... + 880.

It is an arithmetic number, because the mean of its divisors is an integer number (26226).

2²⁴⁷⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

247984 is an abundant number, since it is smaller than the sum of its proper divisors (276536).

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

247984 is a wasteful number, since it uses less digits than its factorization.

247984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428 (or 1422 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 247984 is about 497.9799192739. The cubic root of 247984 is about 62.8262618873.

It can be divided in two parts, 24 and 7984, that added together give a palindrome (8008).

The spelling of 247984 in words is "two hundred forty-seven thousand, nine hundred eighty-four".