115821888 has 168 divisors, whose sum is σ = 384304032. Its totient is φ = 30514176.

The previous prime is 115821869. The next prime is 115821991. The reversal of 115821888 is 888128511.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 121831 + ... + 122777.

It is an arithmetic number, because the mean of its divisors is an integer number (2287524).

Almost surely, 2^115821888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115821888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192152016).

115821888 is an abundant number, since it is smaller than the sum of its proper divisors (268482144).

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

115821888 is a wasteful number, since it uses less digits than its factorization.

115821888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 972 counting only the distinct ones).

The product of its digits is 40960, while the sum is 42.

The square root of 115821888 is about 10762.0577957935. The cubic root of 115821888 is about 487.4501555876.

The spelling of 115821888 in words is "one hundred fifteen million, eight hundred twenty-one thousand, eight hundred eighty-eight".