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208481388 = 22324172089
BaseRepresentation
bin11000110110100…
…10110001101100
3112112021221200220
430123102301230
5411332401023
632404251340
75111030313
oct1433226154
9475257626
10208481388
11a7756175
12599a0b50
133426688b
141d98d27a
15134823e3
hexc6d2c6c

208481388 has 24 divisors (see below), whose sum is σ = 488481840. Its totient is φ = 69204480.

The previous prime is 208481369. The next prime is 208481389. The reversal of 208481388 is 883184802.

208481388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (208481389) 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, 33153 + ... + 38936.

It is an arithmetic number, because the mean of its divisors is an integer number (20353410).

Almost surely, 2208481388 is an apocalyptic number.

It is an amenable number.

208481388 is an abundant number, since it is smaller than the sum of its proper divisors (280000452).

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

208481388 is a wasteful number, since it uses less digits than its factorization.

208481388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72337 (or 72335 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 42.

The square root of 208481388 is about 14438.8845829586. The cubic root of 208481388 is about 592.9559480692.

The spelling of 208481388 in words is "two hundred eight million, four hundred eighty-one thousand, three hundred eighty-eight".

Divisors: 1 2 3 4 6 12 241 482 723 964 1446 2892 72089 144178 216267 288356 432534 865068 17373449 34746898 52120347 69493796 104240694 208481388