1980669396 has 12 divisors (see below), whose sum is σ = 4621561952. Its totient is φ = 660223128.

The previous prime is 1980669389. The next prime is 1980669409. The reversal of 1980669396 is 6939660891.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82527880 + ... + 82527903.

Almost surely, 2^1980669396 is an apocalyptic number.

It is an amenable number.

1980669396 is an abundant number, since it is smaller than the sum of its proper divisors (2640892556).

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

1980669396 is a wasteful number, since it uses less digits than its factorization.

1980669396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165055790 (or 165055788 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 57.

The square root of 1980669396 is about 44504.7120651286. The cubic root of 1980669396 is about 1255.8487290265.

The spelling of 1980669396 in words is "one billion, nine hundred eighty million, six hundred sixty-nine thousand, three hundred ninety-six".