118428081 has 16 divisors (see below), whose sum is σ = 165641856. Its totient is φ = 75119616.

The previous prime is 118428077. The next prime is 118428097. The reversal of 118428081 is 180824811.

It is not a de Polignac number, because 118428081 - 2² = 118428077 is a prime.

It is a super-2 number, since 2×118428081² = 28050420738685122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (118428041) 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 15 ways as a sum of consecutive naturals, for example, 8871 + ... + 17763.

It is an arithmetic number, because the mean of its divisors is an integer number (10352616).

Almost surely, 2^118428081 is an apocalyptic number.

It is an amenable number.

118428081 is a deficient number, since it is larger than the sum of its proper divisors (47213775).

118428081 is a wasteful number, since it uses less digits than its factorization.

118428081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112.

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 118428081 is about 10882.4666781020. The cubic root of 118428081 is about 491.0792275259.

The spelling of 118428081 in words is "one hundred eighteen million, four hundred twenty-eight thousand, eighty-one".