819128 has 32 divisors (see below), whose sum is σ = 1717200. Its totient is φ = 364032.

The previous prime is 819101. The next prime is 819131. The reversal of 819128 is 821918.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 819128.

It is a congruent number.

It is an unprimeable number.

819128 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 2426 + ... + 2742.

2⁸¹⁹¹²⁸ is an apocalyptic number.

It is an amenable number.

819128 is an abundant number, since it is smaller than the sum of its proper divisors (898072).

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

819128 is a wasteful number, since it uses less digits than its factorization.

819128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 355 counting only the distinct ones).

The product of its digits is 1152, while the sum is 29.

The square root of 819128 is about 905.0569042883. The cubic root of 819128 is about 93.5658262759.

The spelling of 819128 in words is "eight hundred nineteen thousand, one hundred twenty-eight".