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12980860 = 2251773523
BaseRepresentation
bin110001100001…
…001001111100
3220102111101121
4301201021330
511310341420
61142120324
7215223034
oct61411174
926374347
1012980860
117366792
1244200a4
1328c65a9
141a1c8c4
1512162aa
hexc6127c

12980860 has 48 divisors (see below), whose sum is σ = 29314656. Its totient is φ = 4810752.

The previous prime is 12980837. The next prime is 12980873. The reversal of 12980860 is 6808921.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 24559 + ... + 25081.

It is an arithmetic number, because the mean of its divisors is an integer number (610722).

Almost surely, 212980860 is an apocalyptic number.

12980860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12980860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14657328).

12980860 is an abundant number, since it is smaller than the sum of its proper divisors (16333796).

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

12980860 is a wasteful number, since it uses less digits than its factorization.

12980860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 12980860 is about 3602.8960573405. The cubic root of 12980860 is about 235.0180158212.

The spelling of 12980860 in words is "twelve million, nine hundred eighty thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 17 20 34 68 73 85 146 170 292 340 365 523 730 1046 1241 1460 2092 2482 2615 4964 5230 6205 8891 10460 12410 17782 24820 35564 38179 44455 76358 88910 152716 177820 190895 381790 649043 763580 1298086 2596172 3245215 6490430 12980860