223990 has 16 divisors (see below), whose sum is σ = 434448. Its totient is φ = 82656.

The previous prime is 223969. The next prime is 223999. The reversal of 223990 is 99322.

223990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223999) by changing a digit.

223990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 732 + ... + 991.

It is an arithmetic number, because the mean of its divisors is an integer number (27153).

2²²³⁹⁹⁰ is an apocalyptic number.

223990 is a deficient number, since it is larger than the sum of its proper divisors (210458).

223990 is a wasteful number, since it uses less digits than its factorization.

223990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743.

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 223990 is about 473.2758181019. The cubic root of 223990 is about 60.7308756773.

The spelling of 223990 in words is "two hundred twenty-three thousand, nine hundred ninety".