115542378 has 24 divisors (see below), whose sum is σ = 286105248. Its totient is φ = 33012072.

The previous prime is 115542377. The next prime is 115542431. The reversal of 115542378 is 873245511.

115542378 is a `hidden beast` number, since 11 + 554 + 23 + 78 = 666.

It is a super-2 number, since 2×115542378² = 26700082227789768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115542373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 458376 + ... + 458627.

It is an arithmetic number, because the mean of its divisors is an integer number (11921052).

Almost surely, 2^115542378 is an apocalyptic number.

115542378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

115542378 is an abundant number, since it is smaller than the sum of its proper divisors (170562870).

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

115542378 is a wasteful number, since it uses less digits than its factorization.

115542378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917018 (or 917015 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 115542378 is about 10749.0640522792. The cubic root of 115542378 is about 487.0577227376.

Adding to 115542378 its reverse (873245511), we get a palindrome (988787889).

The spelling of 115542378 in words is "one hundred fifteen million, five hundred forty-two thousand, three hundred seventy-eight".