223690 has 8 divisors (see below), whose sum is σ = 402660. Its totient is φ = 89472.

The previous prime is 223681. The next prime is 223697. The reversal of 223690 is 96322.

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 1849 = 471^2 + 43^2 .

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

It is a super-2 number, since 2×223690² = 100074432200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223697) 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, 11175 + ... + 11194.

2²²³⁶⁹⁰ is an apocalyptic number.

223690 is a deficient number, since it is larger than the sum of its proper divisors (178970).

223690 is a wasteful number, since it uses less digits than its factorization.

223690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22376.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 223690 is about 472.9587719876. The cubic root of 223690 is about 60.7037503552.

The spelling of 223690 in words is "two hundred twenty-three thousand, six hundred ninety".