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65010720 = 25351731257
BaseRepresentation
bin1111011111111…
…1110000100000
311112022212221110
43313333300200
5113120320340
610241223320
71416403425
oct367776040
9145285843
1065010720
1133773575
1219931b40
13106128a8
1488c3d4c
155a92680
hex3dffc20

65010720 has 192 divisors, whose sum is σ = 224695296. Its totient is φ = 15728640.

The previous prime is 65010709. The next prime is 65010727. The reversal of 65010720 is 2701056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65010727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 252832 + ... + 253088.

It is an arithmetic number, because the mean of its divisors is an integer number (1170288).

Almost surely, 265010720 is an apocalyptic number.

65010720 is a gapful number since it is divisible by the number (60) 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 65010720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112347648).

65010720 is an abundant number, since it is smaller than the sum of its proper divisors (159684576).

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

65010720 is a wasteful number, since it uses less digits than its factorization.

65010720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323 (or 315 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 65010720 is about 8062.9225470669. The cubic root of 65010720 is about 402.0946783260.

Adding to 65010720 its reverse (2701056), we get a palindrome (67711776).

The spelling of 65010720 in words is "sixty-five million, ten thousand, seven hundred twenty".