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2012808385 = 57199288989
BaseRepresentation
bin111011111111001…
…0000010011000001
312012021110021000201
41313332100103001
513110234332020
6531421245201
7100610406010
oct16776202301
95167407021
102012808385
119431a5805
12482103801
132610102a3
14151470a77
15bba92a0a
hex77f904c1

2012808385 has 16 divisors (see below), whose sum is σ = 2774304000. Its totient is φ = 1373270976.

The previous prime is 2012808383. The next prime is 2012808397. The reversal of 2012808385 is 5838082102.

It is not a de Polignac number, because 2012808385 - 21 = 2012808383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2012808383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137530 + ... + 151459.

It is an arithmetic number, because the mean of its divisors is an integer number (173394000).

Almost surely, 22012808385 is an apocalyptic number.

It is an amenable number.

2012808385 is a deficient number, since it is larger than the sum of its proper divisors (761495615).

2012808385 is a wasteful number, since it uses less digits than its factorization.

2012808385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289200.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 2012808385 is about 44864.3331054859. Note that the first 3 decimals coincide. The cubic root of 2012808385 is about 1262.6049209930.

The spelling of 2012808385 in words is "two billion, twelve million, eight hundred eight thousand, three hundred eighty-five".

Divisors: 1 5 7 35 199 995 1393 6965 288989 1444945 2022923 10114615 57508811 287544055 402561677 2012808385