115805778 has 32 divisors (see below), whose sum is σ = 255286080. Its totient is φ = 34728960.

The previous prime is 115805773. The next prime is 115805797. The reversal of 115805778 is 877508511.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115805773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2643 + ... + 15446.

It is an arithmetic number, because the mean of its divisors is an integer number (7977690).

Almost surely, 2^115805778 is an apocalyptic number.

115805778 is an abundant number, since it is smaller than the sum of its proper divisors (139480302).

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

115805778 is a wasteful number, since it uses less digits than its factorization.

115805778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18202.

The product of its (nonzero) digits is 78400, while the sum is 42.

The square root of 115805778 is about 10761.3093069570. The cubic root of 115805778 is about 487.4275542576.

The spelling of 115805778 in words is "one hundred fifteen million, eight hundred five thousand, seven hundred seventy-eight".