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123200220 = 2235111383173
BaseRepresentation
bin1110101011111…
…10001011011100
322120211012221010
413111332023130
5223014401340
620120335220
73024120213
oct725761334
9276735833
10123200220
11635a8170
1235314510
131c6a7750
141251007a
15ac38b80
hex757e2dc

123200220 has 192 divisors, whose sum is σ = 412521984. Its totient is φ = 27079680.

The previous prime is 123200219. The next prime is 123200239. The reversal of 123200220 is 22002321.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 123200196 and 123200205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 712054 + ... + 712226.

It is an arithmetic number, because the mean of its divisors is an integer number (2148552).

Almost surely, 2123200220 is an apocalyptic number.

123200220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123200220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206260992).

123200220 is an abundant number, since it is smaller than the sum of its proper divisors (289321764).

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

123200220 is a wasteful number, since it uses less digits than its factorization.

123200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 123200220 is about 11099.5594507170. The cubic root of 123200220 is about 497.5886831292.

Adding to 123200220 its reverse (22002321), we get a palindrome (145202541).

The spelling of 123200220 in words is "one hundred twenty-three million, two hundred thousand, two hundred twenty".