244542240 has 120 divisors (see below), whose sum is σ = 863076060. Its totient is φ = 65207808.

The previous prime is 244542203. The next prime is 244542253. The reversal of 244542240 is 42245442.

It can be written as a sum of positive squares in 2 ways, for example, as 229704336 + 14837904 = 15156^2 + 3852^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 19 ways as a sum of consecutive naturals, for example, 3526 + ... + 22394.

Almost surely, 2^244542240 is an apocalyptic number.

244542240 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 244542240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (431538030).

244542240 is an abundant number, since it is smaller than the sum of its proper divisors (618533820).

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

244542240 is a wasteful number, since it uses less digits than its factorization.

244542240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18896 (or 18879 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 244542240 is about 15637.8463990410. The cubic root of 244542240 is about 625.3425237164.

Adding to 244542240 its reverse (42245442), we get a palindrome (286787682).

The spelling of 244542240 in words is "two hundred forty-four million, five hundred forty-two thousand, two hundred forty".