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208672 = 256521
BaseRepresentation
bin110010111100100000
3101121020121
4302330200
523134142
64250024
71526242
oct627440
9347217
10208672
11132862
12a0914
1373c99
1456092
1541c67
hex32f20

208672 has 12 divisors (see below), whose sum is σ = 410886. Its totient is φ = 104320.

The previous prime is 208667. The next prime is 208673. The reversal of 208672 is 276802.

It can be written as a sum of positive squares in only one way, i.e., 132496 + 76176 = 364^2 + 276^2 .

It is not an unprimeable number, because it can be changed into a prime (208673) by changing a digit.

208672 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3229 + ... + 3292.

2208672 is an apocalyptic number.

It is an amenable number.

208672 is a deficient number, since it is larger than the sum of its proper divisors (202214).

208672 is an equidigital number, since it uses as much as digits as its factorization.

208672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6531 (or 6523 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 208672 is about 456.8063046850. The cubic root of 208672 is about 59.3136603830.

The spelling of 208672 in words is "two hundred eight thousand, six hundred seventy-two".

Divisors: 1 2 4 8 16 32 6521 13042 26084 52168 104336 208672