115647840 has 432 divisors, whose sum is σ = 504176400. Its totient is φ = 23869440.

The previous prime is 115647827. The next prime is 115647869. The reversal of 115647840 is 48746511.

It is a happy number.

115647840 is a `hidden beast` number, since 1 + 1 + 5 + 647 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 115647795 and 115647804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 776086 + ... + 776234.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^115647840 is an apocalyptic number.

115647840 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 115647840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252088200).

115647840 is an abundant number, since it is smaller than the sum of its proper divisors (388528560).

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

115647840 is a wasteful number, since it uses less digits than its factorization.

115647840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 115647840 is about 10753.9685697886. The cubic root of 115647840 is about 487.2058659619.

The spelling of 115647840 in words is "one hundred fifteen million, six hundred forty-seven thousand, eight hundred forty".