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865429889 = 37138116937
BaseRepresentation
bin110011100101010…
…110100110000001
32020022110101121212
4303211112212001
53233022224024
6221513055505
730306014132
oct6345264601
92208411555
10865429889
11404570315
122019b7595
1310a3b14bc
1482d1bc89
1550e9da0e
hex33956981

865429889 has 8 divisors (see below), whose sum is σ = 889516008. Its totient is φ = 841380480.

The previous prime is 865429871. The next prime is 865429891. The reversal of 865429889 is 988924568.

It can be written as a sum of positive squares in 4 ways, for example, as 213393664 + 652036225 = 14608^2 + 25535^2 .

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 865429889 - 212 = 865425793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (865420889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42629 + ... + 59565.

It is an arithmetic number, because the mean of its divisors is an integer number (111189501).

Almost surely, 2865429889 is an apocalyptic number.

It is an amenable number.

865429889 is a deficient number, since it is larger than the sum of its proper divisors (24086119).

865429889 is a wasteful number, since it uses less digits than its factorization.

865429889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18355.

The product of its digits is 9953280, while the sum is 59.

The square root of 865429889 is about 29418.1897641578. The cubic root of 865429889 is about 952.9657599547.

The spelling of 865429889 in words is "eight hundred sixty-five million, four hundred twenty-nine thousand, eight hundred eighty-nine".

Divisors: 1 37 1381 16937 51097 626669 23389997 865429889