844840880 has 40 divisors (see below), whose sum is σ = 2115354192. Its totient is φ = 311940864.

The previous prime is 844840873. The next prime is 844840889. The reversal of 844840880 is 88048448.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×844840880² = 1427512225038348800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (844840889) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 405134 + ... + 407213.

Almost surely, 2^844840880 is an apocalyptic number.

844840880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

844840880 is an abundant number, since it is smaller than the sum of its proper divisors (1270513312).

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

844840880 is a wasteful number, since it uses less digits than its factorization.

844840880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812373 (or 812367 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 44.

The square root of 844840880 is about 29066.1466314336. The cubic root of 844840880 is about 945.3478483906.

The spelling of 844840880 in words is "eight hundred forty-four million, eight hundred forty thousand, eight hundred eighty".