228728043 has 40 divisors (see below), whose sum is σ = 353788512. Its totient is φ = 147153024.

The previous prime is 228728033. The next prime is 228728057. The reversal of 228728043 is 340827822.

It is not a de Polignac number, because 228728043 - 2⁸ = 228727787 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228727989 and 228728007.

It is not an unprimeable number, because it can be changed into a prime (228728033) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 500271 + ... + 500727.

Almost surely, 2^228728043 is an apocalyptic number.

228728043 is a deficient number, since it is larger than the sum of its proper divisors (125060469).

228728043 is a wasteful number, since it uses less digits than its factorization.

228728043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 228728043 is about 15123.7575688054. The cubic root of 228728043 is about 611.5610318148.

The spelling of 228728043 in words is "two hundred twenty-eight million, seven hundred twenty-eight thousand, forty-three".