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20763228 = 2231919059
BaseRepresentation
bin100111100110…
…1001001011100
31110001212210110
41033031021130
520303410403
62021010020
7341325123
oct117151134
943055713
1020763228
11107a17a2
126b53910
1343bc945
142a86aba
151c52103
hex13cd25c

20763228 has 24 divisors (see below), whose sum is σ = 48706560. Its totient is φ = 6884080.

The previous prime is 20763203. The next prime is 20763229. The reversal of 20763228 is 82236702.

It is a super-2 number, since 2×207632282 = 862223273959968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20763195 and 20763204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20763229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2238 + ... + 6821.

It is an arithmetic number, because the mean of its divisors is an integer number (2029440).

Almost surely, 220763228 is an apocalyptic number.

It is an amenable number.

20763228 is an abundant number, since it is smaller than the sum of its proper divisors (27943332).

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

20763228 is a wasteful number, since it uses less digits than its factorization.

20763228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9257 (or 9255 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 20763228 is about 4556.6685198728. The cubic root of 20763228 is about 274.8516136110.

The spelling of 20763228 in words is "twenty million, seven hundred sixty-three thousand, two hundred twenty-eight".

Divisors: 1 2 3 4 6 12 191 382 573 764 1146 2292 9059 18118 27177 36236 54354 108708 1730269 3460538 5190807 6921076 10381614 20763228