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208490 = 2520849
BaseRepresentation
bin110010111001101010
3101120222212
4302321222
523132430
64245122
71525562
oct627152
9346885
10208490
11132707
12a07a2
1373b89
1455da2
1541b95
hex32e6a

208490 has 8 divisors (see below), whose sum is σ = 375300. Its totient is φ = 83392.

The previous prime is 208489. The next prime is 208493. The reversal of 208490 is 94802.

It can be written as a sum of positive squares in 2 ways, for example, as 201601 + 6889 = 449^2 + 83^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (208493) 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, 10415 + ... + 10434.

2208490 is an apocalyptic number.

208490 is a deficient number, since it is larger than the sum of its proper divisors (166810).

208490 is a wasteful number, since it uses less digits than its factorization.

208490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20856.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 208490 is about 456.6070520699. The cubic root of 208490 is about 59.2964112613.

The spelling of 208490 in words is "two hundred eight thousand, four hundred ninety".

Divisors: 1 2 5 10 20849 41698 104245 208490