844919980 has 12 divisors (see below), whose sum is σ = 1774332000. Its totient is φ = 337967984.

The previous prime is 844919969. The next prime is 844919983. The reversal of 844919980 is 89919448.

It is a happy number.

844919980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (844919983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21122980 + ... + 21123019.

It is an arithmetic number, because the mean of its divisors is an integer number (147861000).

Almost surely, 2^844919980 is an apocalyptic number.

It is an amenable number.

844919980 is an abundant number, since it is smaller than the sum of its proper divisors (929412020).

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

844919980 is a wasteful number, since it uses less digits than its factorization.

844919980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42246008 (or 42246006 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 844919980 is about 29067.5072890676. The cubic root of 844919980 is about 945.3773508618.

The spelling of 844919980 in words is "eight hundred forty-four million, nine hundred nineteen thousand, nine hundred eighty".