840417874 has 16 divisors (see below), whose sum is σ = 1303324416. Its totient is φ = 406018800.

The previous prime is 840417871. The next prime is 840417901. The reversal of 840417874 is 478714048.

It is a self number, because there is not a number n which added to its sum of digits gives 840417874.

It is not an unprimeable number, because it can be changed into a prime (840417871) 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 7 ways as a sum of consecutive naturals, for example, 30729 + ... + 51235.

It is an arithmetic number, because the mean of its divisors is an integer number (81457776).

Almost surely, 2^840417874 is an apocalyptic number.

840417874 is a deficient number, since it is larger than the sum of its proper divisors (462906542).

840417874 is a wasteful number, since it uses less digits than its factorization.

840417874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21201.

The product of its (nonzero) digits is 200704, while the sum is 43.

The square root of 840417874 is about 28989.9616074254. The cubic root of 840417874 is about 943.6952305745.

The spelling of 840417874 in words is "eight hundred forty million, four hundred seventeen thousand, eight hundred seventy-four".