Base | Representation |
---|---|
bin | 11000011010100000000000 |
3 | 110001011011001 |
4 | 120122200000 |
5 | 3114300000 |
6 | 345101344 |
7 | 105253615 |
oct | 30324000 |
9 | 13034131 |
10 | 6400000 |
11 | 3681462 |
12 | 2187854 |
13 | 14310a9 |
14 | bc850c |
15 | 86646a |
hex | 61a800 |
6400000 has 72 divisors (see below), whose sum is σ = 15995070. Its totient is φ = 2560000.
The previous prime is 6399971. The next prime is 6400013. The reversal of 6400000 is 46.
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 can be written as a sum of positive squares in 3 ways, for example, as 9216 + 6390784 = 96^2 + 2528^2 .
It is a Harshad number since it is a multiple of its sum of digits (10).
It is a nialpdrome in base 10.
It is a self number, because there is not a number n which added to its sum of digits gives 6400000.
It is an unprimeable number.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1279998 + ... + 1280002.
Almost surely, 26400000 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 6400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7997535).
6400000 is an abundant number, since it is smaller than the sum of its proper divisors (9595070).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6400000 is an frugal number, since it uses more digits than its factorization.
6400000 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 47 (or 7 counting only the distinct ones).
The product of its (nonzero) digits is 24, while the sum is 10.
The square root of 6400000 is about 2529.8221281347. The cubic root of 6400000 is about 185.6635533445.
Multiplying 6400000 by its sum of digits (10), we get a 6-th power (64000000 = 206).
6400000 divided by its sum of digits (10) gives a square (640000 = 8002).
Adding to 6400000 its reverse (46), we get a palindrome (6400046).
The spelling of 6400000 in words is "six million, four hundred thousand".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.072 sec. • engine limits •