840984849 has 24 divisors (see below), whose sum is σ = 1333856160. Its totient is φ = 527674176.

The previous prime is 840984829. The next prime is 840984863. The reversal of 840984849 is 948489048.

It is not a de Polignac number, because 840984849 - 2⁵ = 840984817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 840984795 and 840984804.

It is not an unprimeable number, because it can be changed into a prime (840984829) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97659 + ... + 105920.

It is an arithmetic number, because the mean of its divisors is an integer number (55577340).

Almost surely, 2^840984849 is an apocalyptic number.

It is an amenable number.

840984849 is a deficient number, since it is larger than the sum of its proper divisors (492871311).

840984849 is a wasteful number, since it uses less digits than its factorization.

840984849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203611 (or 203599 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 54.

The square root of 840984849 is about 28999.7387746855. The cubic root of 840984849 is about 943.9073993632.

The spelling of 840984849 in words is "eight hundred forty million, nine hundred eighty-four thousand, eight hundred forty-nine".