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68002885 = 523895693
BaseRepresentation
bin1000000110110…
…10010001000101
311201221220102101
410003122101011
5114402043020
610425312101
71454005066
oct403322105
9151856371
1068002885
1135427635
121a935631
131111c7c2
14906256d
155e8400a
hex40da445

68002885 has 8 divisors (see below), whose sum is σ = 81651960. Its totient is φ = 54369984.

The previous prime is 68002841. The next prime is 68002939. The reversal of 68002885 is 58820086.

It can be written as a sum of positive squares in 4 ways, for example, as 88804 + 67914081 = 298^2 + 8241^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 68002885 - 27 = 68002757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9099 + ... + 14791.

It is an arithmetic number, because the mean of its divisors is an integer number (10206495).

Almost surely, 268002885 is an apocalyptic number.

It is an amenable number.

68002885 is a deficient number, since it is larger than the sum of its proper divisors (13649075).

68002885 is a wasteful number, since it uses less digits than its factorization.

68002885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 68002885 is about 8246.3861781995. The cubic root of 68002885 is about 408.1712824508.

The spelling of 68002885 in words is "sixty-eight million, two thousand, eight hundred eighty-five".

Divisors: 1 5 2389 5693 11945 28465 13600577 68002885