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12000880 = 245150011
BaseRepresentation
bin101101110001…
…111001110000
3211120201010001
4231301321300
511033012010
61105115344
7204001663
oct55617160
924521101
1012000880
116857491
124028b54
132642518
1418456da
1510c0c3a
hexb71e70

12000880 has 20 divisors (see below), whose sum is σ = 27902232. Its totient is φ = 4800320.

The previous prime is 12000851. The next prime is 12000881. The reversal of 12000880 is 8800021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×120008802 = 288042241548800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000881) 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, 74926 + ... + 75085.

Almost surely, 212000880 is an apocalyptic number.

12000880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12000880 is an abundant number, since it is smaller than the sum of its proper divisors (15901352).

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

12000880 is a wasteful number, since it uses less digits than its factorization.

12000880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150024 (or 150018 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 12000880 is about 3464.2286298684. The cubic root of 12000880 is about 228.9484447546.

It can be divided in two parts, 12000 and 880, that added together give a triangular number (12880 = T160).

The spelling of 12000880 in words is "twelve million, eight hundred eighty", and thus it is an aban number.

Divisors: 1 2 4 5 8 10 16 20 40 80 150011 300022 600044 750055 1200088 1500110 2400176 3000220 6000440 12000880