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67428753 = 3723171447
BaseRepresentation
bin1000000010011…
…10000110010001
311200212201212020
410001032012101
5114230210003
610405122053
71446064200
oct401160621
9150781766
1067428753
1135075247
121a6b9329
1310c7b392
148d53237
155dbdd53
hex404e191

67428753 has 24 divisors (see below), whose sum is σ = 104985792. Its totient is φ = 38382624.

The previous prime is 67428743. The next prime is 67428769. The reversal of 67428753 is 35782476.

It is not a de Polignac number, because 67428753 - 25 = 67428721 is a prime.

It is a super-2 number, since 2×674287532 = 9093273462270018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67428743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45876 + ... + 47322.

It is an arithmetic number, because the mean of its divisors is an integer number (4374408).

Almost surely, 267428753 is an apocalyptic number.

It is an amenable number.

67428753 is a deficient number, since it is larger than the sum of its proper divisors (37557039).

67428753 is a wasteful number, since it uses less digits than its factorization.

67428753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1774 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 67428753 is about 8211.5012634719. The cubic root of 67428753 is about 407.0193371596.

The spelling of 67428753 in words is "sixty-seven million, four hundred twenty-eight thousand, seven hundred fifty-three".

Divisors: 1 3 7 21 49 147 317 951 1447 2219 4341 6657 10129 15533 30387 46599 70903 212709 458699 1376097 3210893 9632679 22476251 67428753