115729018 has 4 divisors (see below), whose sum is σ = 173593530. Its totient is φ = 57864508.

The previous prime is 115728989. The next prime is 115729021. The reversal of 115729018 is 810927511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 810927511 = 11971 ⋅67741.

It can be written as a sum of positive squares in only one way, i.e., 115412049 + 316969 = 10743^2 + 563^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28932253 + ... + 28932256.

Almost surely, 2^115729018 is an apocalyptic number.

115729018 is a deficient number, since it is larger than the sum of its proper divisors (57864512).

115729018 is an equidigital number, since it uses as much as digits as its factorization.

115729018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57864511.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 115729018 is about 10757.7422352462. The cubic root of 115729018 is about 487.3198359457.

The spelling of 115729018 in words is "one hundred fifteen million, seven hundred twenty-nine thousand, eighteen".