1980681630 has 32 divisors (see below), whose sum is σ = 4756316544. Its totient is φ = 527883936.

The previous prime is 1980681629. The next prime is 1980681631. The reversal of 1980681630 is 361860891.

It is an interprime number because it is at equal distance from previous prime (1980681629) and next prime (1980681631).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980681631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38329 + ... + 73691.

It is an arithmetic number, because the mean of its divisors is an integer number (148634892).

Almost surely, 2^1980681630 is an apocalyptic number.

1980681630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1980681630 is an abundant number, since it is smaller than the sum of its proper divisors (2775634914).

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

1980681630 is a wasteful number, since it uses less digits than its factorization.

1980681630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37240.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1980681630 is about 44504.8495110364. The cubic root of 1980681630 is about 1255.8513146880.

The spelling of 1980681630 in words is "one billion, nine hundred eighty million, six hundred eighty-one thousand, six hundred thirty".