840845845 has 16 divisors (see below), whose sum is σ = 1203298560. Its totient is φ = 551510784.

The previous prime is 840845843. The next prime is 840845869. The reversal of 840845845 is 548548048.

It is a cyclic number.

It is not a de Polignac number, because 840845845 - 2¹ = 840845843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840845795 and 840845804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840845843) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 521460 + ... + 523069.

It is an arithmetic number, because the mean of its divisors is an integer number (75206160).

Almost surely, 2^840845845 is an apocalyptic number.

It is an amenable number.

840845845 is a deficient number, since it is larger than the sum of its proper divisors (362452715).

840845845 is a wasteful number, since it uses less digits than its factorization.

840845845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044564.

The product of its (nonzero) digits is 819200, while the sum is 46.

The square root of 840845845 is about 28997.3420333657. The cubic root of 840845845 is about 943.8553912389.

The spelling of 840845845 in words is "eight hundred forty million, eight hundred forty-five thousand, eight hundred forty-five".