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68080340 = 22531109807
BaseRepresentation
bin1000000111011…
…01001011010100
311202002211200002
410003231023110
5114412032330
610431110432
71454446646
oct403551324
9152084602
1068080340
113547a849
121a972418
1311148b33
149082896
155e9be45
hex40ed2d4

68080340 has 24 divisors (see below), whose sum is σ = 147581952. Its totient is φ = 26353440.

The previous prime is 68080321. The next prime is 68080343. The reversal of 68080340 is 4308086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68080343) 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, 54284 + ... + 55523.

It is an arithmetic number, because the mean of its divisors is an integer number (6149248).

Almost surely, 268080340 is an apocalyptic number.

It is an amenable number.

68080340 is an abundant number, since it is smaller than the sum of its proper divisors (79501612).

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

68080340 is a wasteful number, since it uses less digits than its factorization.

68080340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109847 (or 109845 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 68080340 is about 8251.0811412808. The cubic root of 68080340 is about 408.3261921098.

The spelling of 68080340 in words is "sixty-eight million, eighty thousand, three hundred forty".

Divisors: 1 2 4 5 10 20 31 62 124 155 310 620 109807 219614 439228 549035 1098070 2196140 3404017 6808034 13616068 17020085 34040170 68080340