224490 has 32 divisors (see below), whose sum is σ = 616320. Its totient is φ = 51264.

The previous prime is 224473. The next prime is 224491. The reversal of 224490 is 94422.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (224491) by changing a digit.

224490 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325 + ... + 744.

It is an arithmetic number, because the mean of its divisors is an integer number (19260).

2²²⁴⁴⁹⁰ is an apocalyptic number.

224490 is an abundant number, since it is smaller than the sum of its proper divisors (391830).

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

224490 is a wasteful number, since it uses less digits than its factorization.

224490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 224490 is about 473.8037568445. The cubic root of 224490 is about 60.7760307758.

The spelling of 224490 in words is "two hundred twenty-four thousand, four hundred ninety".