844708641 has 16 divisors (see below), whose sum is σ = 1317110784. Its totient is φ = 471464784.

The previous prime is 844708637. The next prime is 844708651. The reversal of 844708641 is 146807448.

It is a happy number.

It is not a de Polignac number, because 844708641 - 2² = 844708637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 844708593 and 844708602.

It is not an unprimeable number, because it can be changed into a prime (844708651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 466821 + ... + 468626.

It is an arithmetic number, because the mean of its divisors is an integer number (82319424).

Almost surely, 2^844708641 is an apocalyptic number.

It is an amenable number.

844708641 is a deficient number, since it is larger than the sum of its proper divisors (472402143).

844708641 is a wasteful number, since it uses less digits than its factorization.

844708641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935500.

The product of its (nonzero) digits is 172032, while the sum is 42.

The square root of 844708641 is about 29063.8717482719. The cubic root of 844708641 is about 945.2985221881.

The spelling of 844708641 in words is "eight hundred forty-four million, seven hundred eight thousand, six hundred forty-one".