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120243220 = 22553113437
BaseRepresentation
bin1110010101011…
…00010000010100
322101020222200121
413022230100110
5221240240340
615533121324
72660023216
oct712542024
9271228617
10120243220
1161968569
1234329244
131bbb0846
1411d805b6
15a85294a
hex72ac414

120243220 has 24 divisors (see below), whose sum is σ = 257277384. Its totient is φ = 47189376.

The previous prime is 120243217. The next prime is 120243223. The reversal of 120243220 is 22342021.

It is an interprime number because it is at equal distance from previous prime (120243217) and next prime (120243223).

It can be written as a sum of positive squares in 4 ways, for example, as 19963024 + 100280196 = 4468^2 + 10014^2 .

It is a junction number, because it is equal to n+sod(n) for n = 120243194 and 120243203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120243223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55659 + ... + 57778.

It is an arithmetic number, because the mean of its divisors is an integer number (10719891).

Almost surely, 2120243220 is an apocalyptic number.

120243220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120243220 is an abundant number, since it is smaller than the sum of its proper divisors (137034164).

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

120243220 is a wasteful number, since it uses less digits than its factorization.

120243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113499 (or 113497 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 120243220 is about 10965.5469539827. The cubic root of 120243220 is about 493.5754300345.

Adding to 120243220 its reverse (22342021), we get a palindrome (142585241).

The spelling of 120243220 in words is "one hundred twenty million, two hundred forty-three thousand, two hundred twenty".

Divisors: 1 2 4 5 10 20 53 106 212 265 530 1060 113437 226874 453748 567185 1134370 2268740 6012161 12024322 24048644 30060805 60121610 120243220