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238030815 = 35111442611
BaseRepresentation
bin11100011000000…
…00111111011111
3121120220012220010
432030000333133
5441413441230
635341454303
75620141251
oct1614007737
9546805803
10238030815
111123a9090
1267871393
133a411749
1423881cd1
1515d6c9b0
hexe300fdf

238030815 has 16 divisors (see below), whose sum is σ = 415472256. Its totient is φ = 115408800.

The previous prime is 238030783. The next prime is 238030817. The reversal of 238030815 is 518030832.

It is a happy number.

It is not a de Polignac number, because 238030815 - 25 = 238030783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238030817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 721141 + ... + 721470.

It is an arithmetic number, because the mean of its divisors is an integer number (25967016).

Almost surely, 2238030815 is an apocalyptic number.

238030815 is a deficient number, since it is larger than the sum of its proper divisors (177441441).

238030815 is a wasteful number, since it uses less digits than its factorization.

238030815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1442630.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 238030815 is about 15428.2473081034. The cubic root of 238030815 is about 619.7421881622.

The spelling of 238030815 in words is "two hundred thirty-eight million, thirty thousand, eight hundred fifteen".

Divisors: 1 3 5 11 15 33 55 165 1442611 4327833 7213055 15868721 21639165 47606163 79343605 238030815