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240489 = 342969
BaseRepresentation
bin111010101101101001
3110012220000
4322231221
530143424
65053213
72021064
oct725551
9405800
10240489
11154757
12b7209
1385602
14638db
154b3c9
hex3ab69

240489 has 10 divisors (see below), whose sum is σ = 359370. Its totient is φ = 160272.

The previous prime is 240479. The next prime is 240491. The reversal of 240489 is 984042.

It can be written as a sum of positive squares in only one way, i.e., 129600 + 110889 = 360^2 + 333^2 .

It is not a de Polignac number, because 240489 - 24 = 240473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (240479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1404 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (35937).

2240489 is an apocalyptic number.

It is an amenable number.

240489 is a deficient number, since it is larger than the sum of its proper divisors (118881).

240489 is an equidigital number, since it uses as much as digits as its factorization.

240489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2981 (or 2972 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 240489 is about 490.3967781297. The cubic root of 240489 is about 62.1868280611.

It can be divided in two parts, 240 and 489, that added together give a 6-th power (729 = 36).

The spelling of 240489 in words is "two hundred forty thousand, four hundred eighty-nine".

Divisors: 1 3 9 27 81 2969 8907 26721 80163 240489