244820640 has 96 divisors (see below), whose sum is σ = 796110336. Its totient is φ = 63175680.

The previous prime is 244820617. The next prime is 244820657. The reversal of 244820640 is 46028442.

244820640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 244820598 and 244820607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6654 + ... + 23106.

It is an arithmetic number, because the mean of its divisors is an integer number (8292816).

Almost surely, 2^244820640 is an apocalyptic number.

244820640 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 244820640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398055168).

244820640 is an abundant number, since it is smaller than the sum of its proper divisors (551289696).

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

244820640 is a wasteful number, since it uses less digits than its factorization.

244820640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16502 (or 16494 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 244820640 is about 15646.7453484742. The cubic root of 244820640 is about 625.5797415400.

The spelling of 244820640 in words is "two hundred forty-four million, eight hundred twenty thousand, six hundred forty".