819828 has 24 divisors (see below), whose sum is σ = 2125760. Its totient is φ = 273240.

The previous prime is 819827. The next prime is 819829. The reversal of 819828 is 828918.

It is an interprime number because it is at equal distance from previous prime (819827) and next prime (819829).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 819792 and 819801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3688 + ... + 3903.

2⁸¹⁹⁸²⁸ is an apocalyptic number.

It is an amenable number.

819828 is an abundant number, since it is smaller than the sum of its proper divisors (1305932).

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

819828 is a wasteful number, since it uses less digits than its factorization.

819828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7604 (or 7596 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 819828 is about 905.4435377206. The cubic root of 819828 is about 93.5924714523.

The spelling of 819828 in words is "eight hundred nineteen thousand, eight hundred twenty-eight".