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689076 = 223219141
BaseRepresentation
bin10101000001110110100
31022000020100
42220032310
5134022301
622434100
75566653
oct2501664
91260210
10689076
11430793
12292930
131b184b
1413d19a
15d9286
hexa83b4

689076 has 18 divisors (see below), whose sum is σ = 1741922. Its totient is φ = 229680.

The previous prime is 689071. The next prime is 689077. The reversal of 689076 is 670986.

It can be written as a sum of positive squares in only one way, i.e., 599076 + 90000 = 774^2 + 300^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 19141 = 689076 / (6 + 8 + 9 + 0 + 7 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 689076.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689071) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9535 + ... + 9606.

2689076 is an apocalyptic number.

It is an amenable number.

689076 is an abundant number, since it is smaller than the sum of its proper divisors (1052846).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

689076 is a wasteful number, since it uses less digits than its factorization.

689076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19151 (or 19146 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 689076 is about 830.1060173255. The cubic root of 689076 is about 88.3260972673.

The spelling of 689076 in words is "six hundred eighty-nine thousand, seventy-six".

Divisors: 1 2 3 4 6 9 12 18 36 19141 38282 57423 76564 114846 172269 229692 344538 689076