228702123 has 36 divisors (see below), whose sum is σ = 371028840. Its totient is φ = 140714496.

The previous prime is 228702119. The next prime is 228702151. The reversal of 228702123 is 321207822.

It is a happy number.

It is not a de Polignac number, because 228702123 - 2² = 228702119 is a prime.

It is a super-2 number, since 2×228702123² = 104609322129414258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (228702163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38283 + ... + 43851.

Almost surely, 2^228702123 is an apocalyptic number.

228702123 is a deficient number, since it is larger than the sum of its proper divisors (142326717).

228702123 is an equidigital number, since it uses as much as digits as its factorization.

228702123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610 (or 5585 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 228702123 is about 15122.9006146308. The cubic root of 228702123 is about 611.5379297638.

Adding to 228702123 its reverse (321207822), we get a palindrome (549909945).

The spelling of 228702123 in words is "two hundred twenty-eight million, seven hundred two thousand, one hundred twenty-three".