844166740 has 12 divisors (see below), whose sum is σ = 1772750196. Its totient is φ = 337666688.

The previous prime is 844166683. The next prime is 844166747. The reversal of 844166740 is 47661448.

It can be written as a sum of positive squares in 2 ways, for example, as 333135504 + 511031236 = 18252^2 + 22606^2 .

It is a junction number, because it is equal to n+sod(n) for n = 844166693 and 844166702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844166747) 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, 21104149 + ... + 21104188.

It is an arithmetic number, because the mean of its divisors is an integer number (147729183).

Almost surely, 2^844166740 is an apocalyptic number.

It is an amenable number.

844166740 is an abundant number, since it is smaller than the sum of its proper divisors (928583456).

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

844166740 is a wasteful number, since it uses less digits than its factorization.

844166740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42208346 (or 42208344 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 844166740 is about 29054.5476646944. The cubic root of 844166740 is about 945.0963349996.

The spelling of 844166740 in words is "eight hundred forty-four million, one hundred sixty-six thousand, seven hundred forty".