247424144 has 80 divisors (see below), whose sum is σ = 546393600. Its totient is φ = 107520000.

The previous prime is 247424123. The next prime is 247424147. The reversal of 247424144 is 441424742.

It is a super-2 number, since 2×247424144² = 122437414068265472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247424144.

It is not an unprimeable number, because it can be changed into a prime (247424147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550832 + ... + 551280.

It is an arithmetic number, because the mean of its divisors is an integer number (6829920).

Almost surely, 2^247424144 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 247424144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273196800).

247424144 is an abundant number, since it is smaller than the sum of its proper divisors (298969456).

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

247424144 is a wasteful number, since it uses less digits than its factorization.

247424144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600 (or 594 counting only the distinct ones).

The product of its digits is 28672, while the sum is 32.

The square root of 247424144 is about 15729.7216758594. The cubic root of 247424144 is about 627.7894678818.

Adding to 247424144 its reverse (441424742), we get a palindrome (688848886).

The spelling of 247424144 in words is "two hundred forty-seven million, four hundred twenty-four thousand, one hundred forty-four".