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2006888680 = 235192640643
BaseRepresentation
bin111011110011110…
…1011000011101000
312011212022111201101
41313213223003220
513102230414210
6531050331144
7100506162256
oct16747530350
95155274641
102006888680
1193a922195
12480129ab4
1325ca199c4
1415076d5d6
15bb2c3a3a
hex779eb0e8

2006888680 has 32 divisors (see below), whose sum is σ = 4753159200. Its totient is φ = 760504896.

The previous prime is 2006888677. The next prime is 2006888687. The reversal of 2006888680 is 868886002.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 2006888680.

It is not an unprimeable number, because it can be changed into a prime (2006888687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1319562 + ... + 1321081.

It is an arithmetic number, because the mean of its divisors is an integer number (148536225).

Almost surely, 22006888680 is an apocalyptic number.

2006888680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2006888680 is an abundant number, since it is smaller than the sum of its proper divisors (2746270520).

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

2006888680 is a wasteful number, since it uses less digits than its factorization.

2006888680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640673 (or 2640669 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 46.

The square root of 2006888680 is about 44798.3111288807. The cubic root of 2006888680 is about 1261.3659244390.

The spelling of 2006888680 in words is "two billion, six million, eight hundred eighty-eight thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 19 20 38 40 76 95 152 190 380 760 2640643 5281286 10562572 13203215 21125144 26406430 50172217 52812860 100344434 105625720 200688868 250861085 401377736 501722170 1003444340 2006888680