819996 has 24 divisors (see below), whose sum is σ = 1997184. Its totient is φ = 261360.

The previous prime is 819991. The next prime is 820037. The reversal of 819996 is 699918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819991) 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, 1210 + ... + 1761.

It is an arithmetic number, because the mean of its divisors is an integer number (83216).

2⁸¹⁹⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

819996 is an abundant number, since it is smaller than the sum of its proper divisors (1177188).

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

819996 is a wasteful number, since it uses less digits than its factorization.

819996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001 (or 2999 counting only the distinct ones).

The product of its digits is 34992, while the sum is 42.

The square root of 819996 is about 905.5363051805. The cubic root of 819996 is about 93.5988640376.

The spelling of 819996 in words is "eight hundred nineteen thousand, nine hundred ninety-six".