844404880 has 80 divisors (see below), whose sum is σ = 2146719744. Its totient is φ = 306339840.

The previous prime is 844404871. The next prime is 844404907. The reversal of 844404880 is 88404448.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506929 + ... + 508591.

Almost surely, 2^844404880 is an apocalyptic number.

844404880 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 844404880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1073359872).

844404880 is an abundant number, since it is smaller than the sum of its proper divisors (1302314864).

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

844404880 is a wasteful number, since it uses less digits than its factorization.

844404880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264 (or 2258 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The square root of 844404880 is about 29058.6455293429. The cubic root of 844404880 is about 945.1851974128.

The spelling of 844404880 in words is "eight hundred forty-four million, four hundred four thousand, eight hundred eighty".