228423938 has 6 divisors (see below), whose sum is σ = 342667971. Its totient is φ = 114201282.

The previous prime is 228423931. The next prime is 228423953. The reversal of 228423938 is 839324822.

228423938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 114211969 + 114211969 = 10687^2 + 10687^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10687.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 228423895 and 228423904.

It is not an unprimeable number, because it can be changed into a prime (228423931) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 16031 + ... + 26717.

Almost surely, 2^228423938 is an apocalyptic number.

228423938 is a deficient number, since it is larger than the sum of its proper divisors (114244033).

228423938 is an frugal number, since it uses more digits than its factorization.

228423938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376 (or 10689 counting only the distinct ones).

The product of its digits is 165888, while the sum is 41.

The square root of 228423938 is about 15113.7003410813. The cubic root of 228423938 is about 611.2898782814.

Multiplying 228423938 by its product of digits (165888), we get a square (37892790226944 = 6155712²).

The spelling of 228423938 in words is "two hundred twenty-eight million, four hundred twenty-three thousand, nine hundred thirty-eight".