| Base | Representation |
|---|---|
| bin | 10000101011101… |
| … | …01001100100000 |
| 3 | 100202022201110200 |
| 4 | 20111311030200 |
| 5 | 241311100030 |
| 6 | 21515225200 |
| 7 | 3316322130 |
| oct | 1025651440 |
| 9 | 322281420 |
| 10 | 139940640 |
| 11 | 71aa1524 |
| 12 | 3aa48200 |
| 13 | 22cb9318 |
| 14 | 1482aac0 |
| 15 | c443d60 |
| hex | 8575320 |
139940640 has 144 divisors (see below), whose sum is σ = 545807808. Its totient is φ = 31984128.
The previous prime is 139940597. The next prime is 139940653. The reversal of 139940640 is 46049931.
139940640 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 4 + 0 + 640 = 666.
It is a tau number, because it is divible by the number of its divisors (144).
It is a super-3 number, since 3×1399406403 (a number of 25 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 139940595 and 139940604.
It is an unprimeable number.
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 23 ways as a sum of consecutive naturals, for example, 3139 + ... + 17021.
It is an arithmetic number, because the mean of its divisors is an integer number (3790332).
Almost surely, 2139940640 is an apocalyptic number.
139940640 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 139940640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272903904).
139940640 is an abundant number, since it is smaller than the sum of its proper divisors (405867168).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
139940640 is a wasteful number, since it uses less digits than its factorization.
139940640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 13911 (or 13900 counting only the distinct ones).
The product of its (nonzero) digits is 23328, while the sum is 36.
The square root of 139940640 is about 11829.6508824225. The cubic root of 139940640 is about 519.1760125606.
The spelling of 139940640 in words is "one hundred thirty-nine million, nine hundred forty thousand, six hundred forty".
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