996646 has 16 divisors (see below), whose sum is σ = 1721376. Its totient is φ = 423936.

The previous prime is 996637. The next prime is 996647. The reversal of 996646 is 646699.

It is a junction number, because it is equal to n+sod(n) for n = 996599 and 996608.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 996646.

It is not an unprimeable number, because it can be changed into a prime (996647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3460 + ... + 3736.

It is an arithmetic number, because the mean of its divisors is an integer number (107586).

2⁹⁹⁶⁶⁴⁶ is an apocalyptic number.

996646 is a deficient number, since it is larger than the sum of its proper divisors (724730).

996646 is a wasteful number, since it uses less digits than its factorization.

996646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543.

The product of its digits is 69984, while the sum is 40.

The square root of 996646 is about 998.3215914724. The cubic root of 996646 is about 99.8880747742. Note that the first 3 decimals are identical.

The spelling of 996646 in words is "nine hundred ninety-six thousand, six hundred forty-six".