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2161768 = 23738603
BaseRepresentation
bin1000001111110001101000
311001211101111
420033301220
51023134033
6114200104
724242350
oct10176150
94054344
102161768
111247194
12883034
135a8c6b
14403b60
152ca7cd
hex20fc68

2161768 has 16 divisors (see below), whose sum is σ = 4632480. Its totient is φ = 926448.

The previous prime is 2161759. The next prime is 2161769. The reversal of 2161768 is 8671612.

It is not an unprimeable number, because it can be changed into a prime (2161769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19246 + ... + 19357.

It is an arithmetic number, because the mean of its divisors is an integer number (289530).

22161768 is an apocalyptic number.

2161768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2161768 is an abundant number, since it is smaller than the sum of its proper divisors (2470712).

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

2161768 is a wasteful number, since it uses less digits than its factorization.

2161768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38616 (or 38612 counting only the distinct ones).

The product of its digits is 4032, while the sum is 31.

The square root of 2161768 is about 1470.2952084531. The cubic root of 2161768 is about 129.3013406774.

The spelling of 2161768 in words is "two million, one hundred sixty-one thousand, seven hundred sixty-eight".

Divisors: 1 2 4 7 8 14 28 56 38603 77206 154412 270221 308824 540442 1080884 2161768