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283240 = 2357397
BaseRepresentation
bin1000101001001101000
3112101112101
41011021220
533030430
610023144
72256526
oct1051150
9471471
10283240
11183891
12117ab4
139bbc9
1475316
1558dca
hex45268

283240 has 32 divisors (see below), whose sum is σ = 652680. Its totient is φ = 110592.

The previous prime is 283211. The next prime is 283267. The reversal of 283240 is 42382.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 228484 + 54756 = 478^2 + 234^2 .

It is an unprimeable number.

283240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2872 + ... + 2968.

2283240 is an apocalyptic number.

283240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 283240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326340).

283240 is an abundant number, since it is smaller than the sum of its proper divisors (369440).

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

283240 is a wasteful number, since it uses less digits than its factorization.

283240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 283240 is about 532.2029688004. The cubic root of 283240 is about 65.6726985049.

The spelling of 283240 in words is "two hundred eighty-three thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 20 40 73 97 146 194 292 365 388 485 584 730 776 970 1460 1940 2920 3880 7081 14162 28324 35405 56648 70810 141620 283240