115640386 has 4 divisors (see below), whose sum is σ = 173460582. Its totient is φ = 57820192.

The previous prime is 115640363. The next prime is 115640387. The reversal of 115640386 is 683046511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 98624761 + 17015625 = 9931^2 + 4125^2 .

It is not an unprimeable number, because it can be changed into a prime (115640387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28910095 + ... + 28910098.

Almost surely, 2^115640386 is an apocalyptic number.

115640386 is a deficient number, since it is larger than the sum of its proper divisors (57820196).

115640386 is an equidigital number, since it uses as much as digits as its factorization.

115640386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57820195.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 115640386 is about 10753.6219944724. The cubic root of 115640386 is about 487.1953982334.

Adding to 115640386 its reverse (683046511), we get a palindrome (798686897).

The spelling of 115640386 in words is "one hundred fifteen million, six hundred forty thousand, three hundred eighty-six".