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2012687180 = 2257109131893
BaseRepresentation
bin111011111110111…
…0010101101001100
312012021020002202122
41313331302231030
513110221442210
6531414512112
7100606362440
oct16775625514
95167202678
102012687180
11943122739
12482065638
13260c9a07a
1415143c820
15bba6bb55
hex77f72b4c

2012687180 has 48 divisors (see below), whose sum is σ = 4874802240. Its totient is φ = 683728128.

The previous prime is 2012687147. The next prime is 2012687219. The reversal of 2012687180 is 817862102.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 2012687180.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50687 + ... + 81206.

It is an arithmetic number, because the mean of its divisors is an integer number (101558380).

Almost surely, 22012687180 is an apocalyptic number.

2012687180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2012687180 is an abundant number, since it is smaller than the sum of its proper divisors (2862115060).

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

2012687180 is a wasteful number, since it uses less digits than its factorization.

2012687180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132018 (or 132016 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 2012687180 is about 44862.9822905254. The cubic root of 2012687180 is about 1262.5795771165.

The spelling of 2012687180 in words is "two billion, twelve million, six hundred eighty-seven thousand, one hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 109 140 218 436 545 763 1090 1526 2180 3052 3815 7630 15260 131893 263786 527572 659465 923251 1318930 1846502 2637860 3693004 4616255 9232510 14376337 18465020 28752674 57505348 71881685 100634359 143763370 201268718 287526740 402537436 503171795 1006343590 2012687180