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12636780 = 22351317953
BaseRepresentation
bin110000001101…
…001001101100
3212210000101220
4300031021230
511213334110
61130503340
7212260632
oct60151154
925700356
1012636780
117151222
124294b50
132805ab0
14196d352
151199370
hexc0d26c

12636780 has 96 divisors (see below), whose sum is σ = 40388544. Its totient is φ = 2924544.

The previous prime is 12636769. The next prime is 12636781. The reversal of 12636780 is 8763621.

It is not an unprimeable number, because it can be changed into a prime (12636781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12784 + ... + 13736.

It is an arithmetic number, because the mean of its divisors is an integer number (420714).

Almost surely, 212636780 is an apocalyptic number.

12636780 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 12636780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20194272).

12636780 is an abundant number, since it is smaller than the sum of its proper divisors (27751764).

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

12636780 is a wasteful number, since it uses less digits than its factorization.

12636780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 993 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 12636780 is about 3554.8248902020. The cubic root of 12636780 is about 232.9228747542.

The spelling of 12636780 in words is "twelve million, six hundred thirty-six thousand, seven hundred eighty".

Divisors: 1 2 3 4 5 6 10 12 13 15 17 20 26 30 34 39 51 52 60 65 68 78 85 102 130 156 170 195 204 221 255 260 340 390 442 510 663 780 884 953 1020 1105 1326 1906 2210 2652 2859 3315 3812 4420 4765 5718 6630 9530 11436 12389 13260 14295 16201 19060 24778 28590 32402 37167 48603 49556 57180 61945 64804 74334 81005 97206 123890 148668 162010 185835 194412 210613 243015 247780 324020 371670 421226 486030 631839 743340 842452 972060 1053065 1263678 2106130 2527356 3159195 4212260 6318390 12636780