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808420487 = 7487237143
BaseRepresentation
bin110000001011111…
…000010010000111
32002100012000102112
4300023320102013
53123423423422
6212115131235
726014314020
oct6013702207
92070160375
10808420487
11385372306
121a68a3b1b
13cb640824
147951bc47
154ae8bee2
hex302f8487

808420487 has 8 divisors (see below), whose sum is σ = 925810176. Its totient is φ = 691506072.

The previous prime is 808420477. The next prime is 808420507. The reversal of 808420487 is 784024808.

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 808420487 - 212 = 808416391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808420427) by changing a digit.

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, 115163 + ... + 121980.

It is an arithmetic number, because the mean of its divisors is an integer number (115726272).

Almost surely, 2808420487 is an apocalyptic number.

808420487 is a deficient number, since it is larger than the sum of its proper divisors (117389689).

808420487 is a wasteful number, since it uses less digits than its factorization.

808420487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237637.

The product of its (nonzero) digits is 114688, while the sum is 41.

The square root of 808420487 is about 28432.7361856013. The cubic root of 808420487 is about 931.5634421851.

The spelling of 808420487 in words is "eight hundred eight million, four hundred twenty thousand, four hundred eighty-seven".

Divisors: 1 7 487 3409 237143 1660001 115488641 808420487