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120055808 = 21131261
BaseRepresentation
bin1110010011111…
…10100000000000
322100220110121102
413021332200000
5221213241213
615525113532
72655312635
oct711764000
9270813542
10120055808
116184a784
12342588a8
131bb46452
1411d3218c
15a817158
hex727e800

120055808 has 72 divisors (see below), whose sum is σ = 252112770. Its totient is φ = 57139200.

The previous prime is 120055807. The next prime is 120055811. The reversal of 120055808 is 808550021.

It can be written as a sum of positive squares in only one way, i.e., 119071744 + 984064 = 10912^2 + 992^2 .

It is not an unprimeable number, because it can be changed into a prime (120055801) 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 5 ways as a sum of consecutive naturals, for example, 1968098 + ... + 1968158.

Almost surely, 2120055808 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 120055808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126056385).

120055808 is an abundant number, since it is smaller than the sum of its proper divisors (132056962).

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

120055808 is an frugal number, since it uses more digits than its factorization.

120055808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 94 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 120055808 is about 10956.9981290498. The cubic root of 120055808 is about 493.3188665509.

The spelling of 120055808 in words is "one hundred twenty million, fifty-five thousand, eight hundred eight".

Divisors: 1 2 4 8 16 31 32 61 62 64 122 124 128 244 248 256 488 496 512 961 976 992 1024 1891 1922 1952 1984 2048 3782 3844 3904 3968 7564 7688 7808 7936 15128 15376 15616 15872 30256 30752 31232 31744 58621 60512 61504 62464 63488 117242 121024 123008 124928 234484 242048 246016 468968 484096 492032 937936 968192 984064 1875872 1936384 1968128 3751744 3872768 7503488 15006976 30013952 60027904 120055808