844871040 has 256 divisors, whose sum is σ = 3223281600. Its totient is φ = 207912960.

The previous prime is 844871011. The next prime is 844871101. The reversal of 844871040 is 40178448.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 844870986 and 844871004.

It is a congruent 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, 222760 + ... + 226520.

Almost surely, 2^844871040 is an apocalyptic number.

844871040 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 844871040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1611640800).

844871040 is an abundant number, since it is smaller than the sum of its proper divisors (2378410560).

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

844871040 is a wasteful number, since it uses less digits than its factorization.

844871040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802 (or 3784 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 844871040 is about 29066.6654434251. The cubic root of 844871040 is about 945.3590975905.

The spelling of 844871040 in words is "eight hundred forty-four million, eight hundred seventy-one thousand, forty".