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12000030 = 235757143
BaseRepresentation
bin101101110001…
…101100011110
3211120122221120
4231301230132
511033000110
61105111410
7203666340
oct55615436
924518846
1012000030
116856889
124028566
132642013
141845290
1510c0870
hexb71b1e

12000030 has 32 divisors (see below), whose sum is σ = 32914944. Its totient is φ = 2742816.

The previous prime is 12000029. The next prime is 12000073. The reversal of 12000030 is 3000021.

Adding to 12000030 its reverse (3000021), we get a palindrome (15000051).

Subtracting from 12000030 its reverse (3000021), we obtain a palindrome (9000009).

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a junction number, because it is equal to n+sod(n) for n = 11999982 and 12000018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28362 + ... + 28781.

It is an arithmetic number, because the mean of its divisors is an integer number (1028592).

Almost surely, 212000030 is an apocalyptic number.

12000030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12000030 is an abundant number, since it is smaller than the sum of its proper divisors (20914914).

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

12000030 is a wasteful number, since it uses less digits than its factorization.

12000030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57160.

The product of its (nonzero) digits is 6, while the sum is 6.

The square root of 12000030 is about 3464.1059452621. The cubic root of 12000030 is about 228.9430392962.

The spelling of 12000030 in words is "twelve million, thirty", and thus it is an aban number and an uban number.

Divisors: 1 2 3 5 6 7 10 14 15 21 30 35 42 70 105 210 57143 114286 171429 285715 342858 400001 571430 800002 857145 1200003 1714290 2000005 2400006 4000010 6000015 12000030