840819049 has 16 divisors (see below), whose sum is σ = 986439168. Its totient is φ = 701733312.

The previous prime is 840819019. The next prime is 840819061. The reversal of 840819049 is 940918048.

840819049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 840819049 - 2⁵ = 840819017 is a prime.

It is a super-2 number, since 2×840819049² = 1413953346322528802, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 840818996 and 840819014.

It is not an unprimeable number, because it can be changed into a prime (840819019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58327 + ... + 71299.

It is an arithmetic number, because the mean of its divisors is an integer number (61652448).

Almost surely, 2^840819049 is an apocalyptic number.

It is an amenable number.

840819049 is a deficient number, since it is larger than the sum of its proper divisors (145620119).

840819049 is a wasteful number, since it uses less digits than its factorization.

840819049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13224.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 840819049 is about 28996.8799873366. The cubic root of 840819049 is about 943.8453648994.

The spelling of 840819049 in words is "eight hundred forty million, eight hundred nineteen thousand, forty-nine".