1992806 has 4 divisors (see below), whose sum is σ = 2989212. Its totient is φ = 996402.

The previous prime is 1992803. The next prime is 1992817. The reversal of 1992806 is 6082991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6082991 = 17 ⋅357823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992803) 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 as a sum of consecutive naturals, namely, 498200 + ... + 498203.

It is an arithmetic number, because the mean of its divisors is an integer number (747303).

2^1992806 is an apocalyptic number.

1992806 is a deficient number, since it is larger than the sum of its proper divisors (996406).

1992806 is an equidigital number, since it uses as much as digits as its factorization.

1992806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996405.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1992806 is about 1411.6678079492. The cubic root of 1992806 is about 125.8408589664.

The spelling of 1992806 in words is "one million, nine hundred ninety-two thousand, eight hundred six".