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68622140 = 22522914983
BaseRepresentation
bin1000001011100…
…01011100111100
311210010100212202
410011301130330
5120031402030
610450451032
71462164356
oct405613474
9153110782
1068622140
113580a914
121ab93a78
13112a8622
1491840d6
156057745
hex417173c

68622140 has 24 divisors (see below), whose sum is σ = 144745440. Its totient is φ = 27327168.

The previous prime is 68622131. The next prime is 68622163. The reversal of 68622140 is 4122686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2912 + ... + 12071.

It is an arithmetic number, because the mean of its divisors is an integer number (6031060).

Almost surely, 268622140 is an apocalyptic number.

It is an amenable number.

68622140 is an abundant number, since it is smaller than the sum of its proper divisors (76123300).

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

68622140 is a wasteful number, since it uses less digits than its factorization.

68622140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15221 (or 15219 counting only the distinct ones).

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

The square root of 68622140 is about 8283.8481396028. The cubic root of 68622140 is about 409.4065179005.

The spelling of 68622140 in words is "sixty-eight million, six hundred twenty-two thousand, one hundred forty".

Divisors: 1 2 4 5 10 20 229 458 916 1145 2290 4580 14983 29966 59932 74915 149830 299660 3431107 6862214 13724428 17155535 34311070 68622140