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208084772 = 227223311489
BaseRepresentation
bin11000110011100…
…01111100100100
3112111112210122102
430121301330210
5411232203042
632351551232
75104456100
oct1431617444
9474483572
10208084772
11a7505195
125982b518
13341581ac
141d8c8900
1513404b32
hexc671f24

208084772 has 72 divisors (see below), whose sum is σ = 456583680. Its totient is φ = 82494720.

The previous prime is 208084769. The next prime is 208084787. The reversal of 208084772 is 277480802.

208084772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139004 + ... + 140492.

It is an arithmetic number, because the mean of its divisors is an integer number (6341440).

Almost surely, 2208084772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208084772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228291840).

208084772 is an abundant number, since it is smaller than the sum of its proper divisors (248498908).

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

208084772 is a wasteful number, since it uses less digits than its factorization.

208084772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 208084772 is about 14425.1437427847. The cubic root of 208084772 is about 592.5796952862.

The spelling of 208084772 in words is "two hundred eight million, eighty-four thousand, seven hundred seventy-two".

Divisors: 1 2 4 7 14 23 28 31 46 49 62 92 98 124 161 196 217 322 434 644 713 868 1127 1426 1489 1519 2254 2852 2978 3038 4508 4991 5956 6076 9982 10423 19964 20846 34247 34937 41692 46159 68494 69874 72961 92318 136988 139748 145922 184636 239729 291844 323113 479458 646226 958916 1061657 1292452 1678103 2123314 2261791 3356206 4246628 4523582 6712412 7431599 9047164 14863198 29726396 52021193 104042386 208084772