808957845 has 24 divisors (see below), whose sum is σ = 1409326776. Its totient is φ = 429249408.

The previous prime is 808957829. The next prime is 808957873. The reversal of 808957845 is 548759808.

It can be written as a sum of positive squares in 4 ways, for example, as 582063876 + 226893969 = 24126^2 + 15063^2 .

It is not a de Polignac number, because 808957845 - 2⁴ = 808957829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 808957791 and 808957800.

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, 36762 + ... + 54491.

It is an arithmetic number, because the mean of its divisors is an integer number (58721949).

Almost surely, 2^808957845 is an apocalyptic number.

It is an amenable number.

808957845 is a deficient number, since it is larger than the sum of its proper divisors (600368931).

808957845 is a wasteful number, since it uses less digits than its factorization.

808957845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91461 (or 91458 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The square root of 808957845 is about 28442.1842515655. The cubic root of 808957845 is about 931.7698002230.

The spelling of 808957845 in words is "eight hundred eight million, nine hundred fifty-seven thousand, eight hundred forty-five".