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12883930 = 251288393
BaseRepresentation
bin110001001001…
…011111011010
3220020120102121
4301021133122
511244241210
61140051454
7214340323
oct61113732
926216377
1012883930
1172aa984
124393b8a
132891437
1419d544a
1511e76da
hexc497da

12883930 has 8 divisors (see below), whose sum is σ = 23191092. Its totient is φ = 5153568.

The previous prime is 12883903. The next prime is 12883931. The reversal of 12883930 is 3938821.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 1520289 = 3371^2 + 1233^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12883931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 644187 + ... + 644206.

Almost surely, 212883930 is an apocalyptic number.

12883930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12883930 is a deficient number, since it is larger than the sum of its proper divisors (10307162).

12883930 is a wasteful number, since it uses less digits than its factorization.

12883930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288400.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 12883930 is about 3589.4191730696. The cubic root of 12883930 is about 234.4315823093.

The spelling of 12883930 in words is "twelve million, eight hundred eighty-three thousand, nine hundred thirty".

Divisors: 1 2 5 10 1288393 2576786 6441965 12883930