244420031440 has 40 divisors (see below), whose sum is σ = 611990158248. Its totient is φ = 90247395840.

The previous prime is 244420031437. The next prime is 244420031441. The reversal of 244420031440 is 44130024442.

It can be written as a sum of positive squares in 4 ways, for example, as 42412931136 + 202007100304 = 205944^2 + 449452^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 244420031399 and 244420031408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (244420031441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117508591 + ... + 117510670.

Almost surely, 2^244420031440 is an apocalyptic number.

244420031440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

244420031440 is an abundant number, since it is smaller than the sum of its proper divisors (367570126808).

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

244420031440 is a wasteful number, since it uses less digits than its factorization.

244420031440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235019287 (or 235019281 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 244420031440 its reverse (44130024442), we get a palindrome (288550055882).

The spelling of 244420031440 in words is "two hundred forty-four billion, four hundred twenty million, thirty-one thousand, four hundred forty".