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28048418507 = 171986837209
BaseRepresentation
bin11010000111110100…
…001110011011001011
32200101202001021212002
4122013310032123023
5424420343343012
620515114541215
72012031423614
oct320764163313
980352037762
1028048418507
1110993667a6a
12552943780b
13284cc71355
141501194c0b
15ae262c7c2
hex687d0e6cb

28048418507 has 8 divisors (see below), whose sum is σ = 31261395600. Its totient is φ = 25009115904.

The previous prime is 28048418491. The next prime is 28048418521. The reversal of 28048418507 is 70581484082.

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 28048418507 - 24 = 28048418491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28048418537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43418282 + ... + 43418927.

It is an arithmetic number, because the mean of its divisors is an integer number (3907674450).

Almost surely, 228048418507 is an apocalyptic number.

28048418507 is a deficient number, since it is larger than the sum of its proper divisors (3212977093).

28048418507 is a wasteful number, since it uses less digits than its factorization.

28048418507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86837245.

The product of its (nonzero) digits is 573440, while the sum is 47.

The spelling of 28048418507 in words is "twenty-eight billion, forty-eight million, four hundred eighteen thousand, five hundred seven".

Divisors: 1 17 19 323 86837209 1476232553 1649906971 28048418507