244392800640 has 128 divisors (see below), whose sum is σ = 781211023200. Its totient is φ = 64986611712.

The previous prime is 244392800621. The next prime is 244392800731. The reversal of 244392800640 is 46008293442.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 244392800592 and 244392800601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 497466 + ... + 858054.

Almost surely, 2^244392800640 is an apocalyptic number.

244392800640 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 244392800640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (390605511600).

244392800640 is an abundant number, since it is smaller than the sum of its proper divisors (536818222560).

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

244392800640 is a wasteful number, since it uses less digits than its factorization.

244392800640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360964 (or 360952 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 244392800640 in words is "two hundred forty-four billion, three hundred ninety-two million, eight hundred thousand, six hundred forty".