223707728 has 20 divisors (see below), whose sum is σ = 437728308. Its totient is φ = 110745600.

The previous prime is 223707721. The next prime is 223707751. The reversal of 223707728 is 827707322.

It can be written as a sum of positive squares in 2 ways, for example, as 220581904 + 3125824 = 14852^2 + 1768^2 .

It is a junction number, because it is equal to n+sod(n) for n = 223707691 and 223707700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223707721) 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 3 ways as a sum of consecutive naturals, for example, 67601 + ... + 70832.

Almost surely, 2^223707728 is an apocalyptic number.

It is an amenable number.

223707728 is a deficient number, since it is larger than the sum of its proper divisors (214020580).

223707728 is a wasteful number, since it uses less digits than its factorization.

223707728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138542 (or 138536 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 38.

The square root of 223707728 is about 14956.8622377824. The cubic root of 223707728 is about 607.0535395491.

The spelling of 223707728 in words is "two hundred twenty-three million, seven hundred seven thousand, seven hundred twenty-eight".