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68030880 = 2535141731
BaseRepresentation
bin1000000111000…
…01000110100000
311202000022211020
410003201012200
5114403442010
610430045440
71454152521
oct403410640
9152008736
1068030880
1135446675
121a949880
131112c478
14906c848
155e8c470
hex40e11a0

68030880 has 48 divisors (see below), whose sum is σ = 214298784. Its totient is φ = 18141440.

The previous prime is 68030869. The next prime is 68030881. The reversal of 68030880 is 8803086.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68030881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70386 + ... + 71345.

It is an arithmetic number, because the mean of its divisors is an integer number (4464558).

Almost surely, 268030880 is an apocalyptic number.

68030880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68030880 is an abundant number, since it is smaller than the sum of its proper divisors (146267904).

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

68030880 is a wasteful number, since it uses less digits than its factorization.

68030880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141749 (or 141741 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 68030880 is about 8248.0834137392. The cubic root of 68030880 is about 408.2272858952.

The spelling of 68030880 in words is "sixty-eight million, thirty thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 80 96 120 160 240 480 141731 283462 425193 566924 708655 850386 1133848 1417310 1700772 2125965 2267696 2834620 3401544 4251930 4535392 5669240 6803088 8503860 11338480 13606176 17007720 22676960 34015440 68030880