Search a number
BaseRepresentation
bin101010000010
310200122
4222002
541230
620242
710562
oct5202
93618
102690
112026
121682
1312bc
14da2
15be5
hexa82

2690 has 8 divisors (see below), whose sum is σ = 4860. Its totient is φ = 1072.

The previous prime is 2689. The next prime is 2693. The reversal of 2690 is 962.

2690 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2401 + 289 = 49^2 + 17^2 .

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

It is a super-2 number, since 2×26902 = 14472200, which contains 22 as substring.

2690 is strictly pandigital in base 5.

It is a Curzon number.

It is a plaindrome in base 13.

It is a nialpdrome in base 14 and base 16.

It is not an unprimeable number, because it can be changed into a prime (2693) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125 + ... + 144.

2690 is a deficient number, since it is larger than the sum of its proper divisors (2170).

2690 is a wasteful number, since it uses less digits than its factorization.

2690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2690 is about 51.8652099196. The cubic root of 2690 is about 13.9075541638.

Subtracting from 2690 its reverse (962), we obtain a cube (1728 = 123).

The spelling of 2690 in words is "two thousand, six hundred ninety".

Divisors: 1 2 5 10 269 538 1345 2690