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67286680 = 23517531867
BaseRepresentation
bin1000000001010…
…11011010011000
311200121111222021
410000223122120
5114211133210
610402104224
71444633036
oct400533230
9150544867
1067286680
1134a8852a
121a64b074
1310c2b806
148d17556
155d91bda
hex402b698

67286680 has 64 divisors (see below), whose sum is σ = 163412640. Its totient is φ = 24840192.

The previous prime is 67286677. The next prime is 67286717. The reversal of 67286680 is 8668276.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35107 + ... + 36973.

Almost surely, 267286680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67286680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81706320).

67286680 is an abundant number, since it is smaller than the sum of its proper divisors (96125960).

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

67286680 is a wasteful number, since it uses less digits than its factorization.

67286680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1948 (or 1944 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 67286680 is about 8202.8458476312. The cubic root of 67286680 is about 406.7332716611.

The spelling of 67286680 in words is "sixty-seven million, two hundred eighty-six thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 17 20 34 40 53 68 85 106 136 170 212 265 340 424 530 680 901 1060 1802 1867 2120 3604 3734 4505 7208 7468 9010 9335 14936 18020 18670 31739 36040 37340 63478 74680 98951 126956 158695 197902 253912 317390 395804 494755 634780 791608 989510 1269560 1682167 1979020 3364334 3958040 6728668 8410835 13457336 16821670 33643340 67286680