115259778 has 12 divisors (see below), whose sum is σ = 249729558. Its totient is φ = 38419920.

The previous prime is 115259747. The next prime is 115259783. The reversal of 115259778 is 877952511.

115259778 is a `hidden beast` number, since 1 + 1 + 52 + 597 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 87665769 + 27594009 = 9363^2 + 5253^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3201643 + ... + 3201678.

Almost surely, 2^115259778 is an apocalyptic number.

115259778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

115259778 is an abundant number, since it is smaller than the sum of its proper divisors (134469780).

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

115259778 is a wasteful number, since it uses less digits than its factorization.

115259778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403329 (or 6403326 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The square root of 115259778 is about 10735.9106739950. The cubic root of 115259778 is about 486.6603075627.

The spelling of 115259778 in words is "one hundred fifteen million, two hundred fifty-nine thousand, seven hundred seventy-eight".