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28608007 = 2947139151
BaseRepresentation
bin110110100100…
…0011000000111
31222211102210211
41231020120013
524310424012
62501100251
7465110161
oct155103007
958742724
1028608007
111516a68a
1296b7687
135c0851c
143b29931
1527a16a7
hex1b48607

28608007 has 16 divisors (see below), whose sum is σ = 30643200. Its totient is φ = 26661600.

The previous prime is 28607987. The next prime is 28608011. The reversal of 28608007 is 70080682.

It is a cyclic number.

It is not a de Polignac number, because 28608007 - 211 = 28605959 is a prime.

It is a house number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28608007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28608407) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 189382 + ... + 189532.

It is an arithmetic number, because the mean of its divisors is an integer number (1915200).

Almost surely, 228608007 is an apocalyptic number.

28608007 is a deficient number, since it is larger than the sum of its proper divisors (2035193).

28608007 is a wasteful number, since it uses less digits than its factorization.

28608007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28608007 is about 5348.6453425143. The cubic root of 28608007 is about 305.8411146336.

Adding to 28608007 its reverse (70080682), we get a palindrome (98688689).

The spelling of 28608007 in words is "twenty-eight million, six hundred eight thousand, seven".

Divisors: 1 29 47 139 151 1363 4031 4379 6533 7097 20989 189457 205813 608681 986483 28608007