1980340000 has 60 divisors (see below), whose sum is σ = 4871982654. Its totient is φ = 792128000.

The previous prime is 1980339983. The next prime is 1980340001. The reversal of 1980340000 is 430891.

It can be written as a sum of positive squares in 5 ways, for example, as 148157584 + 1832182416 = 12172^2 + 42804^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (1980340001) 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 in 9 ways as a sum of consecutive naturals, for example, 29509 + ... + 69508.

Almost surely, 2^1980340000 is an apocalyptic number.

1980340000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1980340000 is an abundant number, since it is smaller than the sum of its proper divisors (2891642654).

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

1980340000 is an frugal number, since it uses more digits than its factorization.

1980340000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99047 (or 99024 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1980340000 is about 44501.0112244655. The cubic root of 1980340000 is about 1255.7791070285.

Adding to 1980340000 its reverse (430891), we get a palindrome (1980770891).

The spelling of 1980340000 in words is "one billion, nine hundred eighty million, three hundred forty thousand".