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22690 = 252269
BaseRepresentation
bin101100010100010
31011010101
411202202
51211230
6253014
7123103
oct54242
934111
1022690
1116058
121116a
13a435
1483aa
156aca
hex58a2

22690 has 8 divisors (see below), whose sum is σ = 40860. Its totient is φ = 9072.

The previous prime is 22679. The next prime is 22691. The reversal of 22690 is 9622.

22690 is digitally balanced in base 6, 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 19881 + 2809 = 141^2 + 53^2 .

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

It is a super-2 number, since 2×226902 = 1029672200, which contains 22 as substring.

22690 is strictly pandigital in base 6.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (22691) 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, 1125 + ... + 1144.

222690 is an apocalyptic number.

22690 is a deficient number, since it is larger than the sum of its proper divisors (18170).

22690 is a wasteful number, since it uses less digits than its factorization.

22690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 22690 is about 150.6320019119. The cubic root of 22690 is about 28.3103234946.

The spelling of 22690 in words is "twenty-two thousand, six hundred ninety".

Divisors: 1 2 5 10 2269 4538 11345 22690