115981680 has 120 divisors (see below), whose sum is σ = 370570032. Its totient is φ = 30007296.

The previous prime is 115981673. The next prime is 115981703. The reversal of 115981680 is 86189511.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328384 + ... + 328736.

Almost surely, 2^115981680 is an apocalyptic number.

115981680 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 115981680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185285016).

115981680 is an abundant number, since it is smaller than the sum of its proper divisors (254588352).

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

115981680 is a wasteful number, since it uses less digits than its factorization.

115981680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 39.

The square root of 115981680 is about 10769.4790960380. The cubic root of 115981680 is about 487.6742204393.

The spelling of 115981680 in words is "one hundred fifteen million, nine hundred eighty-one thousand, six hundred eighty".