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271986 = 231113317
BaseRepresentation
bin1000010011001110010
3111211002120
41002121302
532200421
65455110
72211651
oct1023162
9454076
10271986
11176390
12111496
1396a50
1471198
15558c6
hex42672

271986 has 32 divisors (see below), whose sum is σ = 641088. Its totient is φ = 75840.

The previous prime is 271981. The next prime is 272003. The reversal of 271986 is 689172.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (271981) 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, 700 + ... + 1016.

It is an arithmetic number, because the mean of its divisors is an integer number (20034).

2271986 is an apocalyptic number.

271986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 271986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320544).

271986 is an abundant number, since it is smaller than the sum of its proper divisors (369102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

271986 is a wasteful number, since it uses less digits than its factorization.

271986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346.

The product of its digits is 6048, while the sum is 33.

The square root of 271986 is about 521.5227703562. The cubic root of 271986 is about 64.7911243750.

Subtracting from 271986 its sum of digits (33), we obtain a triangular number (271953 = T737).

The spelling of 271986 in words is "two hundred seventy-one thousand, nine hundred eighty-six".

Divisors: 1 2 3 6 11 13 22 26 33 39 66 78 143 286 317 429 634 858 951 1902 3487 4121 6974 8242 10461 12363 20922 24726 45331 90662 135993 271986