247828 has 24 divisors (see below), whose sum is σ = 508032. Its totient is φ = 103584.

The previous prime is 247813. The next prime is 247829. The reversal of 247828 is 828742.

It is a super-2 number, since 2×247828² = 122837435168, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 247828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1401 + ... + 1567.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2²⁴⁷⁸²⁸ is an apocalyptic number.

247828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254016).

247828 is an abundant number, since it is smaller than the sum of its proper divisors (260204).

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

247828 is a wasteful number, since it uses less digits than its factorization.

247828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 229 counting only the distinct ones).

The product of its digits is 7168, while the sum is 31.

The square root of 247828 is about 497.8232618109. The cubic root of 247828 is about 62.8130850254.

The spelling of 247828 in words is "two hundred forty-seven thousand, eight hundred twenty-eight".