[go: up one dir, main page]

Search a number
-
+
640456359 = 3359594667
BaseRepresentation
bin100110001011001…
…001011010100111
31122122010112221220
4212023021122213
52302424100414
6143315111423
721604534464
oct4613113247
91578115856
10640456359
112a9580384
1215a5a2573
13a28c207a
14610b866b
153b35eca9
hex262c96a7

640456359 has 8 divisors (see below), whose sum is σ = 856321920. Its totient is φ = 425780856.

The previous prime is 640456343. The next prime is 640456361. The reversal of 640456359 is 953654046.

640456359 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640456359 - 24 = 640456343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640456359.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640456309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296257 + ... + 298410.

It is an arithmetic number, because the mean of its divisors is an integer number (107040240).

Almost surely, 2640456359 is an apocalyptic number.

640456359 is a deficient number, since it is larger than the sum of its proper divisors (215865561).

640456359 is a wasteful number, since it uses less digits than its factorization.

640456359 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595029.

The product of its (nonzero) digits is 388800, while the sum is 42.

The square root of 640456359 is about 25307.2392607333. The cubic root of 640456359 is about 861.9786597753.

The spelling of 640456359 in words is "six hundred forty million, four hundred fifty-six thousand, three hundred fifty-nine".

Divisors: 1 3 359 1077 594667 1784001 213485453 640456359