115784640 has 168 divisors, whose sum is σ = 413278320. Its totient is φ = 30855168.

The previous prime is 115784629. The next prime is 115784657. The reversal of 115784640 is 46487511.

It is a happy number.

115784640 is a `hidden beast` number, since 1 + 1 + 5 + 7 + 8 + 4 + 640 = 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 = 115784595 and 115784604.

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, 77016 + ... + 78504.

It is an arithmetic number, because the mean of its divisors is an integer number (2459990).

Almost surely, 2^115784640 is an apocalyptic number.

115784640 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 115784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206639160).

115784640 is an abundant number, since it is smaller than the sum of its proper divisors (297493680).

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

115784640 is an equidigital number, since it uses as much as digits as its factorization.

115784640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521 (or 1499 counting only the distinct ones).

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

The square root of 115784640 is about 10760.3271325736. The cubic root of 115784640 is about 487.3978957761.

The spelling of 115784640 in words is "one hundred fifteen million, seven hundred eighty-four thousand, six hundred forty".