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68225780 = 22573713171
BaseRepresentation
bin1000001000100…
…00101011110100
311202101020011202
410010100223310
5114431211110
610434152032
71455623660
oct404205364
9152336152
1068225780
113556a047
121aa22618
131119a0ac
1490bd8a0
155eca0a5
hex4110af4

68225780 has 48 divisors (see below), whose sum is σ = 168180096. Its totient is φ = 22757760.

The previous prime is 68225779. The next prime is 68225783. The reversal of 68225780 is 8752286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68225783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1406 + ... + 11765.

It is an arithmetic number, because the mean of its divisors is an integer number (3503752).

Almost surely, 268225780 is an apocalyptic number.

It is an amenable number.

68225780 is an abundant number, since it is smaller than the sum of its proper divisors (99954316).

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

68225780 is a wasteful number, since it uses less digits than its factorization.

68225780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13224 (or 13222 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 68225780 is about 8259.8898297738. The cubic root of 68225780 is about 408.6167543194.

It can be divided in two parts, 682 and 25780, that added together give a palindrome (26462).

The spelling of 68225780 in words is "sixty-eight million, two hundred twenty-five thousand, seven hundred eighty".

Divisors: 1 2 4 5 7 10 14 20 28 35 37 70 74 140 148 185 259 370 518 740 1036 1295 2590 5180 13171 26342 52684 65855 92197 131710 184394 263420 368788 460985 487327 921970 974654 1843940 1949308 2436635 3411289 4873270 6822578 9746540 13645156 17056445 34112890 68225780