1980378612 has 24 divisors (see below), whose sum is σ = 5134315200. Its totient is φ = 660126168.

The previous prime is 1980378571. The next prime is 1980378613. The reversal of 1980378612 is 2168730891.

1980378612 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980378613) 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, 9168312 + ... + 9168527.

It is an arithmetic number, because the mean of its divisors is an integer number (213929800).

Almost surely, 2^1980378612 is an apocalyptic number.

1980378612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1980378612 is an abundant number, since it is smaller than the sum of its proper divisors (3153936588).

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

1980378612 is a wasteful number, since it uses less digits than its factorization.

1980378612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18336852 (or 18336844 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 1980378612 is about 44501.4450551889. The cubic root of 1980378612 is about 1255.7872685610.

The spelling of 1980378612 in words is "one billion, nine hundred eighty million, three hundred seventy-eight thousand, six hundred twelve".