1980766 has 4 divisors (see below), whose sum is σ = 2971152. Its totient is φ = 990382.

The previous prime is 1980763. The next prime is 1980773. The reversal of 1980766 is 6670891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6670891 = 43 ⋅155137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495190 + ... + 495193.

It is an arithmetic number, because the mean of its divisors is an integer number (742788).

2^1980766 is an apocalyptic number.

1980766 is a deficient number, since it is larger than the sum of its proper divisors (990386).

1980766 is an equidigital number, since it uses as much as digits as its factorization.

1980766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990385.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 1980766 is about 1407.3968878749. The cubic root of 1980766 is about 125.5869146036.

The spelling of 1980766 in words is "one million, nine hundred eighty thousand, seven hundred sixty-six".