819022042 has 16 divisors (see below), whose sum is σ = 1282703040. Its totient is φ = 391475392.

The previous prime is 819022033. The next prime is 819022067. The reversal of 819022042 is 240220918.

It is a self number, because there is not a number n which added to its sum of digits gives 819022042.

It is an unprimeable number.

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, 93753 + ... + 102115.

It is an arithmetic number, because the mean of its divisors is an integer number (80168940).

Almost surely, 2^819022042 is an apocalyptic number.

819022042 is a deficient number, since it is larger than the sum of its proper divisors (463680998).

819022042 is a wasteful number, since it uses less digits than its factorization.

819022042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 819022042 is about 28618.5611448235. The cubic root of 819022042 is about 935.6179171093.

The spelling of 819022042 in words is "eight hundred nineteen million, twenty-two thousand, forty-two".