223784428 has 24 divisors (see below), whose sum is σ = 448084224. Its totient is φ = 95797200.

The previous prime is 223784423. The next prime is 223784453. The reversal of 223784428 is 824487322.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (223784423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23073 + ... + 31303.

It is an arithmetic number, because the mean of its divisors is an integer number (18670176).

Almost surely, 2^223784428 is an apocalyptic number.

223784428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

223784428 is an abundant number, since it is smaller than the sum of its proper divisors (224299796).

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

223784428 is a wasteful number, since it uses less digits than its factorization.

223784428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9213 (or 9211 counting only the distinct ones).

The product of its digits is 172032, while the sum is 40.

The square root of 223784428 is about 14959.4260585091. The cubic root of 223784428 is about 607.1229093568.

The spelling of 223784428 in words is "two hundred twenty-three million, seven hundred eighty-four thousand, four hundred twenty-eight".