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67803985 = 578717231
BaseRepresentation
bin1000000101010…
…01101101010001
311201120210120201
410002221231101
5114324211420
610421135201
71452216154
oct402515521
9151523521
1067803985
1135301157
121a85a501
1311080102
14900dc9b
155e4510a
hex40a9b51

67803985 has 8 divisors (see below), whose sum is σ = 81472896. Its totient is φ = 54171120.

The previous prime is 67803961. The next prime is 67804003. The reversal of 67803985 is 58930876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 67803985 - 29 = 67803473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4681 + ... + 12550.

It is an arithmetic number, because the mean of its divisors is an integer number (10184112).

Almost surely, 267803985 is an apocalyptic number.

It is an amenable number.

67803985 is a deficient number, since it is larger than the sum of its proper divisors (13668911).

67803985 is a wasteful number, since it uses less digits than its factorization.

67803985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18023.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 67803985 is about 8234.3175187747. The cubic root of 67803985 is about 407.7729437174.

It can be divided in two parts, 6780398 and 5, that added together give a triangular number (6780403 = T3682).

The spelling of 67803985 in words is "sixty-seven million, eight hundred three thousand, nine hundred eighty-five".

Divisors: 1 5 787 3935 17231 86155 13560797 67803985