845894644 has 72 divisors (see below), whose sum is σ = 1855139328. Its totient is φ = 335522880.

The previous prime is 845894603. The next prime is 845894669. The reversal of 845894644 is 446498548.

It is a junction number, because it is equal to n+sod(n) for n = 845894591 and 845894600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 136722 + ... + 142774.

It is an arithmetic number, because the mean of its divisors is an integer number (25765824).

Almost surely, 2^845894644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845894644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (927569664).

845894644 is an abundant number, since it is smaller than the sum of its proper divisors (1009244684).

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

845894644 is a wasteful number, since it uses less digits than its factorization.

845894644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6116 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 52.

The square root of 845894644 is about 29084.2679811612. The cubic root of 845894644 is about 945.7407269658.

The spelling of 845894644 in words is "eight hundred forty-five million, eight hundred ninety-four thousand, six hundred forty-four".