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12980830 = 252235821
BaseRepresentation
bin110001100001…
…001001011110
3220102111100111
4301201021132
511310341310
61142120234
7215222662
oct61411136
926374314
1012980830
117366765
12442007a
1328c6585
141a1c8a2
15121628a
hexc6125e

12980830 has 16 divisors (see below), whose sum is σ = 23474304. Its totient is φ = 5168160.

The previous prime is 12980783. The next prime is 12980837. The reversal of 12980830 is 3808921.

It is a junction number, because it is equal to n+sod(n) for n = 12980792 and 12980801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12980837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681 + ... + 5140.

It is an arithmetic number, because the mean of its divisors is an integer number (1467144).

Almost surely, 212980830 is an apocalyptic number.

12980830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12980830 is a deficient number, since it is larger than the sum of its proper divisors (10493474).

12980830 is a wasteful number, since it uses less digits than its factorization.

12980830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6051.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 12980830 is about 3602.8918940207. The cubic root of 12980830 is about 235.0178347714.

The spelling of 12980830 in words is "twelve million, nine hundred eighty thousand, eight hundred thirty".

Divisors: 1 2 5 10 223 446 1115 2230 5821 11642 29105 58210 1298083 2596166 6490415 12980830