844648642 has 16 divisors (see below), whose sum is σ = 1324786752. Its totient is φ = 403128880.

The previous prime is 844648631. The next prime is 844648643. The reversal of 844648642 is 246846448.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a junction number, because it is equal to n+sod(n) for n = 844648592 and 844648601.

It is not an unprimeable number, because it can be changed into a prime (844648643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3888 + ... + 41284.

It is an arithmetic number, because the mean of its divisors is an integer number (82799172).

Almost surely, 2^844648642 is an apocalyptic number.

844648642 is a deficient number, since it is larger than the sum of its proper divisors (480138110).

844648642 is a wasteful number, since it uses less digits than its factorization.

844648642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37913.

The product of its digits is 1179648, while the sum is 46.

The square root of 844648642 is about 29062.8395378015. The cubic root of 844648642 is about 945.2761403844.

The spelling of 844648642 in words is "eight hundred forty-four million, six hundred forty-eight thousand, six hundred forty-two".