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139240 = 235592
BaseRepresentation
bin100001111111101000
321002000001
4201333220
513423430
62552344
71116643
oct417750
9232001
10139240
1195682
12686b4
134b4ba
1438a5a
152b3ca
hex21fe8

139240 has 24 divisors (see below), whose sum is σ = 318690. Its totient is φ = 54752.

The previous prime is 139201. The next prime is 139241. The reversal of 139240 is 42931.

It can be written as a sum of positive squares in only one way, i.e., 125316 + 13924 = 354^2 + 118^2 .

It is not an unprimeable number, because it can be changed into a prime (139241) 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, 2331 + ... + 2389.

2139240 is an apocalyptic number.

139240 is a gapful number since it is divisible by the number (10) 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 139240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159345).

139240 is an abundant number, since it is smaller than the sum of its proper divisors (179450).

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

139240 is an equidigital number, since it uses as much as digits as its factorization.

139240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 139240 is about 373.1487638999. The cubic root of 139240 is about 51.8308110650.

The spelling of 139240 in words is "one hundred thirty-nine thousand, two hundred forty".

Divisors: 1 2 4 5 8 10 20 40 59 118 236 295 472 590 1180 2360 3481 6962 13924 17405 27848 34810 69620 139240