844936840 has 128 divisors (see below), whose sum is σ = 2198016000. Its totient is φ = 289094400.

The previous prime is 844936831. The next prime is 844936853. The reversal of 844936840 is 48639448.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1763721 + ... + 1764199.

It is an arithmetic number, because the mean of its divisors is an integer number (17172000).

Almost surely, 2^844936840 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844936840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099008000).

844936840 is an abundant number, since it is smaller than the sum of its proper divisors (1353079160).

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

844936840 is a wasteful number, since it uses less digits than its factorization.

844936840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 46.

The square root of 844936840 is about 29067.7973021693. The cubic root of 844936840 is about 945.3836390140.

The spelling of 844936840 in words is "eight hundred forty-four million, nine hundred thirty-six thousand, eight hundred forty".