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68222800 = 2452170557
BaseRepresentation
bin1000001000011…
…11111101010000
311202101002002101
410010033331100
5114431112200
610434130144
71455612202
oct404177520
9152332071
1068222800
1135567888
121aa20954
1311198929
1490bc772
155ec926a
hex410ff50

68222800 has 30 divisors (see below), whose sum is σ = 163906238. Its totient is φ = 27288960.

The previous prime is 68222767. The next prime is 68222801. The reversal of 68222800 is 822286.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 456976 + 67765824 = 676^2 + 8232^2 .

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68222801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 84879 + ... + 85678.

Almost surely, 268222800 is an apocalyptic number.

It is an amenable number.

68222800 is an abundant number, since it is smaller than the sum of its proper divisors (95683438).

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

68222800 is a wasteful number, since it uses less digits than its factorization.

68222800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170575 (or 170564 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 68222800 is about 8259.7094379887. The cubic root of 68222800 is about 408.6108049766.

The spelling of 68222800 in words is "sixty-eight million, two hundred twenty-two thousand, eight hundred".

Divisors: 1 2 4 5 8 10 16 20 25 40 50 80 100 200 400 170557 341114 682228 852785 1364456 1705570 2728912 3411140 4263925 6822280 8527850 13644560 17055700 34111400 68222800