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12838880 = 255292767
BaseRepresentation
bin110000111110…
…011111100000
3220011021122002
4300332133200
511241321010
61135103132
7214062065
oct60763740
926137562
1012838880
11727a04a
124371aa8
132876a92
1419c2c6c
1511d91a5
hexc3e7e0

12838880 has 48 divisors (see below), whose sum is σ = 31389120. Its totient is φ = 4956672.

The previous prime is 12838877. The next prime is 12838907. The reversal of 12838880 is 8883821.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3257 + ... + 6023.

It is an arithmetic number, because the mean of its divisors is an integer number (653940).

Almost surely, 212838880 is an apocalyptic number.

12838880 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 12838880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15694560).

12838880 is an abundant number, since it is smaller than the sum of its proper divisors (18550240).

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

12838880 is a wasteful number, since it uses less digits than its factorization.

12838880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811 (or 2803 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 12838880 is about 3583.1382892654. The cubic root of 12838880 is about 234.1580250917.

The spelling of 12838880 in words is "twelve million, eight hundred thirty-eight thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 16 20 29 32 40 58 80 116 145 160 232 290 464 580 928 1160 2320 2767 4640 5534 11068 13835 22136 27670 44272 55340 80243 88544 110680 160486 221360 320972 401215 442720 641944 802430 1283888 1604860 2567776 3209720 6419440 12838880