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12013880 = 235300347
BaseRepresentation
bin101101110101…
…000100111000
3211121100221112
4231311010320
511033421010
61105255452
7204054614
oct55650470
924540845
1012013880
11686622a
124034588
132648408
14184a344
1510c4a05
hexb75138

12013880 has 16 divisors (see below), whose sum is σ = 27031320. Its totient is φ = 4805536.

The previous prime is 12013877. The next prime is 12013891. The reversal of 12013880 is 8831021.

12013880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150134 + ... + 150213.

Almost surely, 212013880 is an apocalyptic number.

12013880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12013880 is an abundant number, since it is smaller than the sum of its proper divisors (15017440).

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

12013880 is a wasteful number, since it uses less digits than its factorization.

12013880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300358 (or 300354 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 12013880 is about 3466.1044415886. The cubic root of 12013880 is about 229.0310846866.

The spelling of 12013880 in words is "twelve million, thirteen thousand, eight hundred eighty".

Divisors: 1 2 4 5 8 10 20 40 300347 600694 1201388 1501735 2402776 3003470 6006940 12013880