247838 has 8 divisors (see below), whose sum is σ = 376488. Its totient is φ = 122344.

The previous prime is 247829. The next prime is 247847. The reversal of 247838 is 838742.

247838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (247829) and next prime (247847).

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

It is a super-2 number, since 2×247838² = 122847348488, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 581 + ... + 912.

It is an arithmetic number, because the mean of its divisors is an integer number (47061).

2²⁴⁷⁸³⁸ is an apocalyptic number.

247838 is a deficient number, since it is larger than the sum of its proper divisors (128650).

247838 is a wasteful number, since it uses less digits than its factorization.

247838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578.

The product of its digits is 10752, while the sum is 32.

The square root of 247838 is about 497.8333054347. The cubic root of 247838 is about 62.8139298619.

The spelling of 247838 in words is "two hundred forty-seven thousand, eight hundred thirty-eight".