844040880 has 60 divisors (see below), whose sum is σ = 2834573040. Its totient is φ = 225077376.

The previous prime is 844040849. The next prime is 844040881. The reversal of 844040880 is 88040448.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×844040880² = 1424810014222348800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (844040881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 585420 + ... + 586859.

It is an arithmetic number, because the mean of its divisors is an integer number (47242884).

Almost surely, 2^844040880 is an apocalyptic number.

844040880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

844040880 is an abundant number, since it is smaller than the sum of its proper divisors (1990532160).

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

844040880 is a wasteful number, since it uses less digits than its factorization.

844040880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1172298 (or 1172289 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 844040880 is about 29052.3816579639. The cubic root of 844040880 is about 945.0493633406.

The spelling of 844040880 in words is "eight hundred forty-four million, forty thousand, eight hundred eighty".