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12318320 = 245721997
BaseRepresentation
bin101110111111…
…011001110000
3212011211120002
4232333121300
511123141240
61120005132
7206463320
oct56773160
925154502
1012318320
116a53a33
1241607a8
132723b61
1418c9280
151134d15
hexbbf670

12318320 has 40 divisors (see below), whose sum is σ = 32733024. Its totient is φ = 4223232.

The previous prime is 12318283. The next prime is 12318329. The reversal of 12318320 is 2381321.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12318292 and 12318301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12318329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10439 + ... + 11558.

Almost surely, 212318320 is an apocalyptic number.

12318320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12318320 is an abundant number, since it is smaller than the sum of its proper divisors (20414704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12318320 is a wasteful number, since it uses less digits than its factorization.

12318320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22017 (or 22011 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 12318320 is about 3509.7464295872. The cubic root of 12318320 is about 230.9495713961.

Adding to 12318320 its reverse (2381321), we get a palindrome (14699641).

The spelling of 12318320 in words is "twelve million, three hundred eighteen thousand, three hundred twenty".

Divisors: 1 2 4 5 7 8 10 14 16 20 28 35 40 56 70 80 112 140 280 560 21997 43994 87988 109985 153979 175976 219970 307958 351952 439940 615916 769895 879880 1231832 1539790 1759760 2463664 3079580 6159160 12318320