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538240 = 275292
BaseRepresentation
bin10000011011010000000
31000100022211
42003122000
5114210430
615311504
74401133
oct2033200
91010284
10538240
1133842a
1221b594
1315acb1
1410021a
15a972a
hex83680

538240 has 48 divisors (see below), whose sum is σ = 1332630. Its totient is φ = 207872.

The previous prime is 538201. The next prime is 538247. The reversal of 538240 is 42835.

It can be written as a sum of positive squares in 3 ways, for example, as 440896 + 97344 = 664^2 + 312^2 .

It is not an unprimeable number, because it can be changed into a prime (538247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18546 + ... + 18574.

2538240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 538240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666315).

538240 is an abundant number, since it is smaller than the sum of its proper divisors (794390).

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

538240 is an equidigital number, since it uses as much as digits as its factorization.

538240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 538240 is about 733.6484171591. The cubic root of 538240 is about 81.3439623005.

The spelling of 538240 in words is "five hundred thirty-eight thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 16 20 29 32 40 58 64 80 116 128 145 160 232 290 320 464 580 640 841 928 1160 1682 1856 2320 3364 3712 4205 4640 6728 8410 9280 13456 16820 18560 26912 33640 53824 67280 107648 134560 269120 538240