223444428 has 24 divisors (see below), whose sum is σ = 522381888. Its totient is φ = 74336976.

The previous prime is 223444409. The next prime is 223444453. The reversal of 223444428 is 824444322.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11526 + ... + 24077.

It is an arithmetic number, because the mean of its divisors is an integer number (21765912).

Almost surely, 2^223444428 is an apocalyptic number.

It is an amenable number.

223444428 is an abundant number, since it is smaller than the sum of its proper divisors (298937460).

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

223444428 is a wasteful number, since it uses less digits than its factorization.

223444428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36133 (or 36131 counting only the distinct ones).

The product of its digits is 49152, while the sum is 33.

The square root of 223444428 is about 14948.0576664662. The cubic root of 223444428 is about 606.8152823255.

The spelling of 223444428 in words is "two hundred twenty-three million, four hundred forty-four thousand, four hundred twenty-eight".