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80383887 = 338113671
BaseRepresentation
bin1001100101010…
…00111110001111
312121020220222000
410302220332033
5131034241022
611550523343
71664152233
oct462507617
9177226860
1080383887
1141413671
1222b06553
131386603c
14a9665c3
1570cc6ac
hex4ca8f8f

80383887 has 16 divisors (see below), whose sum is σ = 119266560. Its totient is φ = 53508600.

The previous prime is 80383883. The next prime is 80383913. The reversal of 80383887 is 78838308.

It is not a de Polignac number, because 80383887 - 22 = 80383883 is a prime.

It is a super-3 number, since 3×803838873 (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80383883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20062 + ... + 23732.

It is an arithmetic number, because the mean of its divisors is an integer number (7454160).

Almost surely, 280383887 is an apocalyptic number.

80383887 is a deficient number, since it is larger than the sum of its proper divisors (38882673).

80383887 is a wasteful number, since it uses less digits than its factorization.

80383887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491 (or 4485 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 80383887 is about 8965.7061629299. The cubic root of 80383887 is about 431.5750547394.

The spelling of 80383887 in words is "eighty million, three hundred eighty-three thousand, eight hundred eighty-seven".

Divisors: 1 3 9 27 811 2433 3671 7299 11013 21897 33039 99117 2977181 8931543 26794629 80383887