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65120020 = 2257266449
BaseRepresentation
bin1111100001101…
…0011100010100
311112112102212121
43320122130110
5113132320040
610243425324
71420340200
oct370323424
9145472777
1065120020
11338386a9
1219985244
1310650574
148911b00
155ab4c4a
hex3e1a714

65120020 has 36 divisors (see below), whose sum is σ = 159081300. Its totient is φ = 22326528.

The previous prime is 65120009. The next prime is 65120039. The reversal of 65120020 is 2002156.

It is a happy number.

65120020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47831056 + 17288964 = 6916^2 + 4158^2 .

It is a junction number, because it is equal to n+sod(n) for n = 65119976 and 65120003.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 32245 + ... + 34204.

It is an arithmetic number, because the mean of its divisors is an integer number (4418925).

Almost surely, 265120020 is an apocalyptic number.

It is an amenable number.

65120020 is an abundant number, since it is smaller than the sum of its proper divisors (93961280).

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

65120020 is a wasteful number, since it uses less digits than its factorization.

65120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66472 (or 66463 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 65120020 is about 8069.6976399367. The cubic root of 65120020 is about 402.3198942157.

Adding to 65120020 its reverse (2002156), we get a palindrome (67122176).

The spelling of 65120020 in words is "sixty-five million, one hundred twenty thousand, twenty".