819912 has 32 divisors (see below), whose sum is σ = 2073600. Its totient is φ = 270144.

The previous prime is 819911. The next prime is 819913. The reversal of 819912 is 219918.

819912 is nontrivially palindromic in base 11.

It is an interprime number because it is at equal distance from previous prime (819911) and next prime (819913).

It is a self number, because there is not a number n which added to its sum of digits gives 819912.

It is not an unprimeable number, because it can be changed into a prime (819911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2914 + ... + 3182.

It is an arithmetic number, because the mean of its divisors is an integer number (64800).

2⁸¹⁹⁹¹² is an apocalyptic number.

It is an amenable number.

819912 is an abundant number, since it is smaller than the sum of its proper divisors (1253688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

819912 is a wasteful number, since it uses less digits than its factorization.

819912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405 (or 401 counting only the distinct ones).

The product of its digits is 1296, while the sum is 30.

The square root of 819912 is about 905.4899226386. The cubic root of 819912 is about 93.5956678541.

The spelling of 819912 in words is "eight hundred nineteen thousand, nine hundred twelve".