845683812 has 18 divisors (see below), whose sum is σ = 2137700838. Its totient is φ = 281894592.

The previous prime is 845683801. The next prime is 845683837. The reversal of 845683812 is 218386548.

845683812 is a `hidden beast` number, since 8 + 4 + 568 + 3 + 81 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 531118116 + 314565696 = 23046^2 + 17736^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×845683812² = 1430362219757702688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11745573 + ... + 11745644.

Almost surely, 2^845683812 is an apocalyptic number.

It is an amenable number.

845683812 is an abundant number, since it is smaller than the sum of its proper divisors (1292017026).

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

845683812 is a wasteful number, since it uses less digits than its factorization.

845683812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23491227 (or 23491222 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 845683812 is about 29080.6432528581. The cubic root of 845683812 is about 945.6621478432.

The spelling of 845683812 in words is "eight hundred forty-five million, six hundred eighty-three thousand, eight hundred twelve".