819968 has 18 divisors (see below), whose sum is σ = 1637244. Its totient is φ = 409856.

The previous prime is 819943. The next prime is 819977. The reversal of 819968 is 869918.

It is a nialpdrome in base 16.

It is an unprimeable number.

819968 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 (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1346 + ... + 1857.

It is an arithmetic number, because the mean of its divisors is an integer number (90958).

2⁸¹⁹⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

819968 is a deficient number, since it is larger than the sum of its proper divisors (817276).

819968 is an equidigital number, since it uses as much as digits as its factorization.

819968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3219 (or 3205 counting only the distinct ones).

The product of its digits is 31104, while the sum is 41.

The square root of 819968 is about 905.5208445972. The cubic root of 819968 is about 93.5977986674.

The spelling of 819968 in words is "eight hundred nineteen thousand, nine hundred sixty-eight".