844421646 has 16 divisors (see below), whose sum is σ = 1724776704. Its totient is φ = 275484984.

The previous prime is 844421621. The next prime is 844421647. The reversal of 844421646 is 646124448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844421647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496920 + ... + 1497483.

It is an arithmetic number, because the mean of its divisors is an integer number (107798544).

Almost surely, 2^844421646 is an apocalyptic number.

844421646 is an abundant number, since it is smaller than the sum of its proper divisors (880355058).

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

844421646 is a wasteful number, since it uses less digits than its factorization.

844421646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994455.

The product of its digits is 147456, while the sum is 39.

The square root of 844421646 is about 29058.9340134837. The cubic root of 844421646 is about 945.1914530493.

The spelling of 844421646 in words is "eight hundred forty-four million, four hundred twenty-one thousand, six hundred forty-six".