819946 has 16 divisors (see below), whose sum is σ = 1297440. Its totient is φ = 388080.

The previous prime is 819943. The next prime is 819977. The reversal of 819946 is 649918.

It is a super-2 number, since 2×819946² = 1344622885832, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (819943) 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, 3781 + ... + 3991.

It is an arithmetic number, because the mean of its divisors is an integer number (81090).

2⁸¹⁹⁹⁴⁶ is an apocalyptic number.

819946 is a deficient number, since it is larger than the sum of its proper divisors (477494).

819946 is a wasteful number, since it uses less digits than its factorization.

819946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309.

The product of its digits is 15552, while the sum is 37.

The square root of 819946 is about 905.5086968108. The cubic root of 819946 is about 93.5969615738.

The spelling of 819946 in words is "eight hundred nineteen thousand, nine hundred forty-six".