844500000 has 168 divisors, whose sum is σ = 2775901968. Its totient is φ = 224800000.

The previous prime is 844499969. The next prime is 844500029. The reversal of 844500000 is 5448.

It is a self number, because there is not a number n which added to its sum of digits gives 844500000.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 1499719 + ... + 1500281.

It is an arithmetic number, because the mean of its divisors is an integer number (16523226).

Almost surely, 2^844500000 is an apocalyptic number.

844500000 is a gapful number since it is divisible by the number (80) 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 844500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1387950984).

844500000 is an abundant number, since it is smaller than the sum of its proper divisors (1931401968).

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

844500000 is an frugal number, since it uses more digits than its factorization.

844500000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 844500000 is about 29060.2821734408. The cubic root of 844500000 is about 945.2206869599.

Adding to 844500000 its reverse (5448), we get a palindrome (844505448).

The spelling of 844500000 in words is "eight hundred forty-four million, five hundred thousand".