115856840 has 64 divisors (see below), whose sum is σ = 288351360. Its totient is φ = 41541120.

The previous prime is 115856837. The next prime is 115856849. The reversal of 115856840 is 48658511.

It is a junction number, because it is equal to n+sod(n) for n = 115856794 and 115856803.

It is not an unprimeable number, because it can be changed into a prime (115856849) 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, 30317 + ... + 33923.

It is an arithmetic number, because the mean of its divisors is an integer number (4505490).

Almost surely, 2^115856840 is an apocalyptic number.

115856840 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 115856840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144175680).

115856840 is an abundant number, since it is smaller than the sum of its proper divisors (172494520).

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

115856840 is a wasteful number, since it uses less digits than its factorization.

115856840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702 (or 3698 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 115856840 is about 10763.6815263180. The cubic root of 115856840 is about 487.4991838689.

The spelling of 115856840 in words is "one hundred fifteen million, eight hundred fifty-six thousand, eight hundred forty".