819944 has 16 divisors (see below), whose sum is σ = 1628100. Its totient is φ = 385792.

The previous prime is 819943. The next prime is 819977. The reversal of 819944 is 449918.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 131044 = 830^2 + 362^2 .

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 3 ways as a sum of consecutive naturals, for example, 2879 + ... + 3150.

2⁸¹⁹⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

819944 is a deficient number, since it is larger than the sum of its proper divisors (808156).

819944 is a wasteful number, since it uses less digits than its factorization.

819944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052 (or 6048 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 819944 is about 905.5075924585. The cubic root of 819944 is about 93.5968854736.

The spelling of 819944 in words is "eight hundred nineteen thousand, nine hundred forty-four".