| Base | Representation |
|---|---|
| bin | 111010111101000… |
| … | …0000010101100000 |
| 3 | 12002212012220221110 |
| 4 | 1311322000111200 |
| 5 | 13022400440000 |
| 6 | 524142223320 |
| 7 | 100006625004 |
| oct | 16572002540 |
| 9 | 5085186843 |
| 10 | 1978140000 |
| 11 | 925676951 |
| 12 | 472584b40 |
| 13 | 256a92455 |
| 14 | 14aa08704 |
| 15 | b89e5850 |
| hex | 75e80560 |
1978140000 has 120 divisors (see below), whose sum is σ = 6488891640. Its totient is φ = 527488000.
The previous prime is 1978139987. The next prime is 1978140007. The reversal of 1978140000 is 418791.
It is a tau number, because it is divible by the number of its divisors (120).
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a self number, because there is not a number n which added to its sum of digits gives 1978140000.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1978140007) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43516 + ... + 76484.
It is an arithmetic number, because the mean of its divisors is an integer number (54074097).
Almost surely, 21978140000 is an apocalyptic number.
1978140000 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 1978140000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3244445820).
1978140000 is an abundant number, since it is smaller than the sum of its proper divisors (4510751640).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1978140000 is an equidigital number, since it uses as much as digits as its factorization.
1978140000 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 33002 (or 32979 counting only the distinct ones).
The product of its (nonzero) digits is 2016, while the sum is 30.
The square root of 1978140000 is about 44476.2858161515. The cubic root of 1978140000 is about 1255.3139112004.
Adding to 1978140000 its reverse (418791), we get a palindrome (1978558791).
The spelling of 1978140000 in words is "one billion, nine hundred seventy-eight million, one hundred forty thousand".
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