Search a number
-
+
684494 = 21918013
BaseRepresentation
bin10100111000111001110
31021202221122
42213013032
5133400434
622400542
75550416
oct2470716
91252848
10684494
114282a8
12290152
131ac735
1413b646
15d7c2e
hexa71ce

684494 has 8 divisors (see below), whose sum is σ = 1080840. Its totient is φ = 324216.

The previous prime is 684493. The next prime is 684527. The reversal of 684494 is 494486.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684493) 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 3 ways as a sum of consecutive naturals, for example, 8969 + ... + 9044.

It is an arithmetic number, because the mean of its divisors is an integer number (135105).

2684494 is an apocalyptic number.

684494 is a deficient number, since it is larger than the sum of its proper divisors (396346).

684494 is a wasteful number, since it uses less digits than its factorization.

684494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18034.

The product of its digits is 27648, while the sum is 35.

The square root of 684494 is about 827.3415256108. The cubic root of 684494 is about 88.1298873939.

The spelling of 684494 in words is "six hundred eighty-four thousand, four hundred ninety-four".

Divisors: 1 2 19 38 18013 36026 342247 684494