115280640 has 108 divisors (see below), whose sum is σ = 398898864. Its totient is φ = 30738432.

The previous prime is 115280629. The next prime is 115280647. The reversal of 115280640 is 46082511.

115280640 is a `hidden beast` number, since 1 + 15 + 2 + 8 + 0 + 640 = 666.

It is not an unprimeable number, because it can be changed into a prime (115280647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6517 + ... + 16523.

It is an arithmetic number, because the mean of its divisors is an integer number (3693508).

Almost surely, 2^115280640 is an apocalyptic number.

115280640 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 115280640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199449432).

115280640 is an abundant number, since it is smaller than the sum of its proper divisors (283618224).

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

115280640 is a wasteful number, since it uses less digits than its factorization.

115280640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10034 (or 10017 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 115280640 is about 10736.8822290272. The cubic root of 115280640 is about 486.6896676021.

The spelling of 115280640 in words is "one hundred fifteen million, two hundred eighty thousand, six hundred forty".