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230387839 = 1167730937
BaseRepresentation
bin11011011101101…
…11000001111111
3121001111220200221
431232313001333
5432434402324
634510002211
75465156443
oct1556670177
9531456627
10230387839
11109058880
12651a6367
1338966986
1422852823
151535d0e4
hexdbb707f

230387839 has 8 divisors (see below), whose sum is σ = 251711568. Its totient is φ = 209127360.

The previous prime is 230387821. The next prime is 230387869. The reversal of 230387839 is 938783032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 230387839 - 29 = 230387327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230387795 and 230387804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230387809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8022 + ... + 22915.

It is an arithmetic number, because the mean of its divisors is an integer number (31463946).

Almost surely, 2230387839 is an apocalyptic number.

230387839 is a deficient number, since it is larger than the sum of its proper divisors (21323729).

230387839 is a wasteful number, since it uses less digits than its factorization.

230387839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31625.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 230387839 is about 15178.5321754114. The cubic root of 230387839 is about 613.0367597424.

The spelling of 230387839 in words is "two hundred thirty million, three hundred eighty-seven thousand, eight hundred thirty-nine".

Divisors: 1 11 677 7447 30937 340307 20944349 230387839