223447428 has 36 divisors (see below), whose sum is σ = 566140848. Its totient is φ = 74309040.

The previous prime is 223447421. The next prime is 223447457. The reversal of 223447428 is 824744322.

223447428 is a `hidden beast` number, since 223 + 4 + 4 + 7 + 428 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 223447392 and 223447401.

It is not an unprimeable number, because it can be changed into a prime (223447421) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 8943 + ... + 22953.

Almost surely, 2^223447428 is an apocalyptic number.

It is an amenable number.

223447428 is an abundant number, since it is smaller than the sum of its proper divisors (342693420).

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

223447428 is a wasteful number, since it uses less digits than its factorization.

223447428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14464 (or 14459 counting only the distinct ones).

The product of its digits is 86016, while the sum is 36.

The square root of 223447428 is about 14948.1580136149. The cubic root of 223447428 is about 606.8179980458.

The spelling of 223447428 in words is "two hundred twenty-three million, four hundred forty-seven thousand, four hundred twenty-eight".