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8028605 = 513123517
BaseRepresentation
bin11110101000000110111101
3120002220011202
4132220012331
54023403410
6444025245
7125146004
oct36500675
916086152
108028605
114594012
122832225
131881470
1410cdc3b
15a88ca5
hex7a81bd

8028605 has 8 divisors (see below), whose sum is σ = 10375512. Its totient is φ = 5928768.

The previous prime is 8028577. The next prime is 8028619. The reversal of 8028605 is 5068208.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 515524 + 7513081 = 718^2 + 2741^2 .

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 8028605 - 212 = 8024509 is a prime.

It is a Duffinian number.

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, 61694 + ... + 61823.

It is an arithmetic number, because the mean of its divisors is an integer number (1296939).

Almost surely, 28028605 is an apocalyptic number.

It is an amenable number.

8028605 is a deficient number, since it is larger than the sum of its proper divisors (2346907).

8028605 is a wasteful number, since it uses less digits than its factorization.

8028605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123535.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 8028605 is about 2833.4793099650. The cubic root of 8028605 is about 200.2380914498.

The spelling of 8028605 in words is "eight million, twenty-eight thousand, six hundred five".

Divisors: 1 5 13 65 123517 617585 1605721 8028605