840829249 has 16 divisors (see below), whose sum is σ = 958854400. Its totient is φ = 735263568.

The previous prime is 840829247. The next prime is 840829291. The reversal of 840829249 is 942928048.

It is not a de Polignac number, because 840829249 - 2¹ = 840829247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840829199 and 840829208.

It is not an unprimeable number, because it can be changed into a prime (840829247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31672 + ... + 51814.

It is an arithmetic number, because the mean of its divisors is an integer number (59928400).

Almost surely, 2^840829249 is an apocalyptic number.

It is an amenable number.

840829249 is a deficient number, since it is larger than the sum of its proper divisors (118025151).

840829249 is a wasteful number, since it uses less digits than its factorization.

840829249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20201 (or 20175 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 840829249 is about 28997.0558677946. The cubic root of 840829249 is about 943.8491814890.

The spelling of 840829249 in words is "eight hundred forty million, eight hundred twenty-nine thousand, two hundred forty-nine".