1980688776 has 32 divisors (see below), whose sum is σ = 5401879200. Its totient is φ = 600208640.

The previous prime is 1980688771. The next prime is 1980688799. The reversal of 1980688776 is 6778860891.

It is not an unprimeable number, because it can be changed into a prime (1980688771) 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, 3751041 + ... + 3751568.

It is an arithmetic number, because the mean of its divisors is an integer number (168808725).

Almost surely, 2^1980688776 is an apocalyptic number.

It is an amenable number.

1980688776 is an abundant number, since it is smaller than the sum of its proper divisors (3421190424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1980688776 is a wasteful number, since it uses less digits than its factorization.

1980688776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7502629 (or 7502625 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 60.

The square root of 1980688776 is about 44504.9297943497. The cubic root of 1980688776 is about 1255.8528249934.

The spelling of 1980688776 in words is "one billion, nine hundred eighty million, six hundred eighty-eight thousand, seven hundred seventy-six".