223030728 has 24 divisors (see below), whose sum is σ = 604041750. Its totient is φ = 74343552.

The previous prime is 223030727. The next prime is 223030729. The reversal of 223030728 is 827030322.

223030728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (223030727) and next prime (223030729).

It can be written as a sum of positive squares in only one way, i.e., 112402404 + 110628324 = 10602^2 + 10518^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (223030727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1548753 + ... + 1548896.

Almost surely, 2^223030728 is an apocalyptic number.

It is an amenable number.

223030728 is an abundant number, since it is smaller than the sum of its proper divisors (381011022).

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

223030728 is a wasteful number, since it uses less digits than its factorization.

223030728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3097661 (or 3097654 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 223030728 is about 14934.2133371664. The cubic root of 223030728 is about 606.4405514591.

The spelling of 223030728 in words is "two hundred twenty-three million, thirty thousand, seven hundred twenty-eight".