845644108 has 12 divisors (see below), whose sum is σ = 1485637272. Its totient is φ = 421176320.

The previous prime is 845644081. The next prime is 845644123. The reversal of 845644108 is 801446548.

It is a super-2 number, since 2×845644108² = 1430227914790231328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410278 + ... + 412333.

It is an arithmetic number, because the mean of its divisors is an integer number (123803106).

Almost surely, 2^845644108 is an apocalyptic number.

It is an amenable number.

845644108 is a deficient number, since it is larger than the sum of its proper divisors (639993164).

845644108 is a wasteful number, since it uses less digits than its factorization.

845644108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822872 (or 822870 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 845644108 is about 29079.9605914451. The cubic root of 845644108 is about 945.6473483176.

The spelling of 845644108 in words is "eight hundred forty-five million, six hundred forty-four thousand, one hundred eight".