819822890 has 16 divisors (see below), whose sum is σ = 1486948320. Its totient is φ = 325425360.

The previous prime is 819822881. The next prime is 819822893. The reversal of 819822890 is 98228918.

It is not an unprimeable number, because it can be changed into a prime (819822893) 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, 311600 + ... + 314219.

It is an arithmetic number, because the mean of its divisors is an integer number (92934270).

Almost surely, 2^819822890 is an apocalyptic number.

819822890 is a deficient number, since it is larger than the sum of its proper divisors (667125430).

819822890 is a wasteful number, since it uses less digits than its factorization.

819822890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625957.

The product of its (nonzero) digits is 165888, while the sum is 47.

The square root of 819822890 is about 28632.5494848084. The cubic root of 819822890 is about 935.9227699751.

The spelling of 819822890 in words is "eight hundred nineteen million, eight hundred twenty-two thousand, eight hundred ninety".