115087840 has 96 divisors (see below), whose sum is σ = 312850944. Its totient is φ = 39191040.

The previous prime is 115087829. The next prime is 115087849. The reversal of 115087840 is 48780511.

It is a junction number, because it is equal to n+sod(n) for n = 115087796 and 115087805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115087849) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 236077 + ... + 236563.

It is an arithmetic number, because the mean of its divisors is an integer number (3258864).

Almost surely, 2^115087840 is an apocalyptic number.

115087840 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 115087840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156425472).

115087840 is an abundant number, since it is smaller than the sum of its proper divisors (197763104).

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

115087840 is a wasteful number, since it uses less digits than its factorization.

115087840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 712 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 115087840 is about 10727.9000741058. The cubic root of 115087840 is about 486.4181963847.

The spelling of 115087840 in words is "one hundred fifteen million, eighty-seven thousand, eight hundred forty".