1980671788 has 12 divisors (see below), whose sum is σ = 3550716792. Its totient is φ = 966181280.

The previous prime is 1980671779. The next prime is 1980671789. The reversal of 1980671788 is 8871760891.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1980671789) 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, 6038470 + ... + 6038797.

It is an arithmetic number, because the mean of its divisors is an integer number (295893066).

Almost surely, 2^1980671788 is an apocalyptic number.

It is an amenable number.

1980671788 is a deficient number, since it is larger than the sum of its proper divisors (1570045004).

1980671788 is a wasteful number, since it uses less digits than its factorization.

1980671788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12077312 (or 12077310 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 55.

The square root of 1980671788 is about 44504.7389386793. The cubic root of 1980671788 is about 1255.8492345776.

The spelling of 1980671788 in words is "one billion, nine hundred eighty million, six hundred seventy-one thousand, seven hundred eighty-eight".