244221240 has 64 divisors (see below), whose sum is σ = 739814400. Its totient is φ = 64490112.

The previous prime is 244221221. The next prime is 244221253. The reversal of 244221240 is 42122442.

It is a congruent number.

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, 2481 + ... + 22239.

It is an arithmetic number, because the mean of its divisors is an integer number (11559600).

Almost surely, 2^244221240 is an apocalyptic number.

244221240 is a gapful number since it is divisible by the number (20) 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 244221240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369907200).

244221240 is an abundant number, since it is smaller than the sum of its proper divisors (495593160).

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

244221240 is a wasteful number, since it uses less digits than its factorization.

244221240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19876 (or 19872 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 244221240 is about 15627.5794670832. The cubic root of 244221240 is about 625.0687838964.

Adding to 244221240 its reverse (42122442), we get a palindrome (286343682).

The spelling of 244221240 in words is "two hundred forty-four million, two hundred twenty-one thousand, two hundred forty".