844740020 has 54 divisors (see below), whose sum is σ = 1819582758. Its totient is φ = 329421312.

The previous prime is 844739999. The next prime is 844740041. The reversal of 844740020 is 20047448.

It is an interprime number because it is at equal distance from previous prime (844739999) and next prime (844740041).

It can be written as a sum of positive squares in 3 ways, for example, as 60403984 + 784336036 = 7772^2 + 28006^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8708612 + ... + 8708708.

It is an arithmetic number, because the mean of its divisors is an integer number (33695977).

Almost surely, 2^844740020 is an apocalyptic number.

It is an amenable number.

844740020 is an abundant number, since it is smaller than the sum of its proper divisors (974842738).

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

844740020 is an equidigital number, since it uses as much as digits as its factorization.

844740020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337 (or 171 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 844740020 is about 29064.4115715423. The cubic root of 844740020 is about 945.3102272714.

Adding to 844740020 its reverse (20047448), we get a palindrome (864787468).

The spelling of 844740020 in words is "eight hundred forty-four million, seven hundred forty thousand, twenty".