244087820640 has 144 divisors (see below), whose sum is σ = 835467783696. Its totient is φ = 64893312000.

The previous prime is 244087820623. The next prime is 244087820651. The reversal of 244087820640 is 46028780442.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220590 + ... + 732690.

It is an arithmetic number, because the mean of its divisors is an integer number (5801859609).

Almost surely, 2^244087820640 is an apocalyptic number.

244087820640 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 244087820640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417733891848).

244087820640 is an abundant number, since it is smaller than the sum of its proper divisors (591379963056).

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

244087820640 is a wasteful number, since it uses less digits than its factorization.

244087820640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512453 (or 512442 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The spelling of 244087820640 in words is "two hundred forty-four billion, eighty-seven million, eight hundred twenty thousand, six hundred forty".