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139288 = 2323757
BaseRepresentation
bin100010000000011000
321002001211
4202000120
513424123
62552504
71120042
oct420030
9232054
10139288
1195716
1268734
134b526
1438a92
152b40d
hex22018

139288 has 16 divisors (see below), whose sum is σ = 272880. Its totient is φ = 66528.

The previous prime is 139273. The next prime is 139291. The reversal of 139288 is 882931.

It is a super-2 number, since 2×1392882 = 38802293888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195 + ... + 562.

It is an arithmetic number, because the mean of its divisors is an integer number (17055).

2139288 is an apocalyptic number.

It is an amenable number.

139288 is a deficient number, since it is larger than the sum of its proper divisors (133592).

139288 is a wasteful number, since it uses less digits than its factorization.

139288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 782 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 139288 is about 373.2130758695. The cubic root of 139288 is about 51.8367662338.

The spelling of 139288 in words is "one hundred thirty-nine thousand, two hundred eighty-eight".

Divisors: 1 2 4 8 23 46 92 184 757 1514 3028 6056 17411 34822 69644 139288