Base | Representation |
---|---|
bin | 10000101011111… |
… | …10100110000000 |
3 | 100202101200021110 |
4 | 20111332212000 |
5 | 241313313021 |
6 | 21520123320 |
7 | 3316542303 |
oct | 1025764600 |
9 | 322350243 |
10 | 139979136 |
11 | 72018440 |
12 | 3aa66540 |
13 | 230009bb |
14 | 1483ab3a |
15 | c450476 |
hex | 857e980 |
139979136 has 128 divisors (see below), whose sum is σ = 419097600. Its totient is φ = 41011200.
The previous prime is 139979131. The next prime is 139979209. The reversal of 139979136 is 631979931.
It is a tau number, because it is divible by the number of its divisors (128).
It is a Harshad number since it is a multiple of its sum of digits (48).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (139979131) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130410 + ... + 131478.
It is an arithmetic number, because the mean of its divisors is an integer number (3274200).
Almost surely, 2139979136 is an apocalyptic number.
139979136 is a gapful number since it is divisible by the number (16) 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 139979136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209548800).
139979136 is an abundant number, since it is smaller than the sum of its proper divisors (279118464).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
139979136 is a wasteful number, since it uses less digits than its factorization.
139979136 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1128 (or 1116 counting only the distinct ones).
The product of its digits is 275562, while the sum is 48.
The square root of 139979136 is about 11831.2778684299. The cubic root of 139979136 is about 519.2236145710.
The spelling of 139979136 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, one hundred thirty-six".
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