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318088989 = 32172079013
BaseRepresentation
bin10010111101011…
…010011100011101
3211011112121001200
4102331122130131
51122412321424
651321430113
710611466101
oct2275323435
9734477050
10318088989
11153609a69
128a63b339
1350b9244a
1430361901
151cdd38c9
hex12f5a71d

318088989 has 12 divisors (see below), whose sum is σ = 486489276. Its totient is φ = 199585152.

The previous prime is 318088973. The next prime is 318089027. The reversal of 318088989 is 989880813.

It can be written as a sum of positive squares in 2 ways, for example, as 247024089 + 71064900 = 15717^2 + 8430^2 .

It is not a de Polignac number, because 318088989 - 24 = 318088973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318088189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1039354 + ... + 1039659.

It is an arithmetic number, because the mean of its divisors is an integer number (40540773).

Almost surely, 2318088989 is an apocalyptic number.

It is an amenable number.

318088989 is a deficient number, since it is larger than the sum of its proper divisors (168400287).

318088989 is a wasteful number, since it uses less digits than its factorization.

318088989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079036 (or 2079033 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 318088989 is about 17835.0494532536. The cubic root of 318088989 is about 682.6260830542.

The spelling of 318088989 in words is "three hundred eighteen million, eighty-eight thousand, nine hundred eighty-nine".

Divisors: 1 3 9 17 51 153 2079013 6237039 18711117 35343221 106029663 318088989