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138198 = 2331743
BaseRepresentation
bin100001101111010110
321000120110
4201233112
513410243
62543450
71113624
oct415726
9230513
10138198
1194915
1267b86
134ab98
1438514
152ae33
hex21bd6

138198 has 16 divisors (see below), whose sum is σ = 285696. Its totient is φ = 44520.

The previous prime is 138197. The next prime is 138209. The reversal of 138198 is 891831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186 + ... + 557.

It is an arithmetic number, because the mean of its divisors is an integer number (17856).

2138198 is an apocalyptic number.

138198 is an abundant number, since it is smaller than the sum of its proper divisors (147498).

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

138198 is a wasteful number, since it uses less digits than its factorization.

138198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 1728, while the sum is 30.

The square root of 138198 is about 371.7499159381. The cubic root of 138198 is about 51.7011955572.

The spelling of 138198 in words is "one hundred thirty-eight thousand, one hundred ninety-eight".

Divisors: 1 2 3 6 31 62 93 186 743 1486 2229 4458 23033 46066 69099 138198