| Base | Representation |
|---|---|
| bin | 10000100111111… |
| … | …00001100001000 |
| 3 | 100201101112120122 |
| 4 | 20103330030020 |
| 5 | 241144220000 |
| 6 | 21500442412 |
| 7 | 3312156122 |
| oct | 1023741410 |
| 9 | 321345518 |
| 10 | 139445000 |
| 11 | 71793102 |
| 12 | 3a849408 |
| 13 | 22b74846 |
| 14 | 1473c212 |
| 15 | c397085 |
| hex | 84fc308 |
139445000 has 60 divisors (see below), whose sum is σ = 328687755. Its totient is φ = 55444000.
The previous prime is 139444997. The next prime is 139445003. The reversal of 139445000 is 544931.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It is an interprime number because it is at equal distance from previous prime (139444997) and next prime (139445003).
It can be written as a sum of positive squares in 3 ways, for example, as 32239684 + 107205316 = 5678^2 + 10354^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=8350.
It is not an unprimeable number, because it can be changed into a prime (139445003) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 834917 + ... + 835083.
Almost surely, 2139445000 is an apocalyptic number.
139445000 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 139445000
139445000 is an abundant number, since it is smaller than the sum of its proper divisors (189242755).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
139445000 is an frugal number, since it uses more digits than its factorization.
139445000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 360 (or 174 counting only the distinct ones).
The product of its (nonzero) digits is 2160, while the sum is 26.
The square root of 139445000 is about 11808.6832458153. The cubic root of 139445000 is about 518.5623504771.
Adding to 139445000 its reverse (544931), we get a palindrome (139989931).
The spelling of 139445000 in words is "one hundred thirty-nine million, four hundred forty-five thousand".
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