1983815680 has 448 divisors, whose sum is σ = 6454639872. Its totient is φ = 566231040.

The previous prime is 1983815671. The next prime is 1983815699. The reversal of 1983815680 is 865183891.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53616622 + ... + 53616658.

Almost surely, 2^1983815680 is an apocalyptic number.

1983815680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1983815680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3227319936).

1983815680 is an abundant number, since it is smaller than the sum of its proper divisors (4470824192).

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

1983815680 is a wasteful number, since it uses less digits than its factorization.

1983815680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The square root of 1983815680 is about 44540.0458015032. The cubic root of 1983815680 is about 1256.5133471653.

The spelling of 1983815680 in words is "one billion, nine hundred eighty-three million, eight hundred fifteen thousand, six hundred eighty".