247213344 has 96 divisors (see below), whose sum is σ = 765628416. Its totient is φ = 68348160.

The previous prime is 247213333. The next prime is 247213387. The reversal of 247213344 is 443312742.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×247213344² = 122228874903324672, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14899 + ... + 26765.

It is an arithmetic number, because the mean of its divisors is an integer number (7975296).

Almost surely, 2^247213344 is an apocalyptic number.

247213344 is a gapful number since it is divisible by the number (24) 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 247213344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (382814208).

247213344 is an abundant number, since it is smaller than the sum of its proper divisors (518415072).

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

247213344 is a wasteful number, since it uses less digits than its factorization.

247213344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11918 (or 11910 counting only the distinct ones).

The product of its digits is 16128, while the sum is 30.

The square root of 247213344 is about 15723.0195573242. The cubic root of 247213344 is about 627.6111295589.

The spelling of 247213344 in words is "two hundred forty-seven million, two hundred thirteen thousand, three hundred forty-four".