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68428760 = 23513712487
BaseRepresentation
bin1000001010000…
…10001111011000
311202202112121112
410011002033120
5120004210020
610442355452
71460430521
oct405021730
9152675545
1068428760
11356985a4
121aabbb88
131123b5ba
149133848
15601a2c5
hex41423d8

68428760 has 32 divisors (see below), whose sum is σ = 155100960. Its totient is φ = 27169536.

The previous prime is 68428753. The next prime is 68428793. The reversal of 68428760 is 6782486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764 + ... + 11723.

It is an arithmetic number, because the mean of its divisors is an integer number (4846905).

Almost surely, 268428760 is an apocalyptic number.

It is an amenable number.

68428760 is an abundant number, since it is smaller than the sum of its proper divisors (86672200).

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

68428760 is a wasteful number, since it uses less digits than its factorization.

68428760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12635 (or 12631 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 68428760 is about 8272.1677932692. The cubic root of 68428760 is about 409.0215813083.

The spelling of 68428760 in words is "sixty-eight million, four hundred twenty-eight thousand, seven hundred sixty".

Divisors: 1 2 4 5 8 10 20 40 137 274 548 685 1096 1370 2740 5480 12487 24974 49948 62435 99896 124870 249740 499480 1710719 3421438 6842876 8553595 13685752 17107190 34214380 68428760