115778857 has 8 divisors (see below), whose sum is σ = 122685192. Its totient is φ = 108883200.

The previous prime is 115778843. The next prime is 115778863. The reversal of 115778857 is 758877511.

It can be written as a sum of positive squares in 4 ways, for example, as 33767721 + 82011136 = 5811^2 + 9056^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115778857 - 2²³ = 107390249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 115778857.

It is not an unprimeable number, because it can be changed into a prime (115778807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34807 + ... + 37987.

It is an arithmetic number, because the mean of its divisors is an integer number (15335649).

Almost surely, 2^115778857 is an apocalyptic number.

115778857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

115778857 is a deficient number, since it is larger than the sum of its proper divisors (6906335).

115778857 is a wasteful number, since it uses less digits than its factorization.

115778857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5339.

The product of its digits is 548800, while the sum is 49.

The square root of 115778857 is about 10760.0584106221. The cubic root of 115778857 is about 487.3897810873.

The spelling of 115778857 in words is "one hundred fifteen million, seven hundred seventy-eight thousand, eight hundred fifty-seven".