247744 has 42 divisors (see below), whose sum is σ = 579120. Its totient is φ = 104832.

The previous prime is 247739. The next prime is 247759. The reversal of 247744 is 447742.

247744 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×247744² = 122754179072, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a nude number because it is divisible by every one of its digits.

It is a nialpdrome in base 14.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3097 + ... + 3175.

2²⁴⁷⁷⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 247744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289560).

247744 is an abundant number, since it is smaller than the sum of its proper divisors (331376).

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

247744 is an equidigital number, since it uses as much as digits as its factorization.

247744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 88 counting only the distinct ones).

The product of its digits is 6272, while the sum is 28.

The square root of 247744 is about 497.7388873697. The cubic root of 247744 is about 62.8059875017.

Adding to 247744 its product of digits (6272), we get a square (254016 = 504²).

The spelling of 247744 in words is "two hundred forty-seven thousand, seven hundred forty-four", and thus it is an iban number.