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28285283137 = 232443950321
BaseRepresentation
bin11010010101111011…
…110010101101000001
32201000020202021001011
4122111323302231001
5430412013030022
620554415440521
72020635640216
oct322573625501
981006667034
1028285283137
1110aa5339961
125594826141
13288a065037
141524811b0d
15b08319977
hex695ef2b41

28285283137 has 8 divisors (see below), whose sum is σ = 29516872320. Its totient is φ = 27053843520.

The previous prime is 28285283119. The next prime is 28285283141. The reversal of 28285283137 is 73138258282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28285283137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28285083137) 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, 536937 + ... + 587257.

It is an arithmetic number, because the mean of its divisors is an integer number (3689609040).

Almost surely, 228285283137 is an apocalyptic number.

It is an amenable number.

28285283137 is a deficient number, since it is larger than the sum of its proper divisors (1231589183).

28285283137 is a wasteful number, since it uses less digits than its factorization.

28285283137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74783.

The product of its digits is 1290240, while the sum is 49.

The spelling of 28285283137 in words is "twenty-eight billion, two hundred eighty-five million, two hundred eighty-three thousand, one hundred thirty-seven".

Divisors: 1 23 24439 50321 562097 1157383 1229794919 28285283137