228888749 has 2 divisors, whose sum is σ = 228888750. Its totient is φ = 228888748.

The previous prime is 228888743. The next prime is 228888757. The reversal of 228888749 is 947888822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220374025 + 8514724 = 14845^2 + 2918^2 .

It is a cyclic number.

It is not a de Polignac number, because 228888749 - 2⁴ = 228888733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 228888694 and 228888703.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228888743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114444374 + 114444375.

It is an arithmetic number, because the mean of its divisors is an integer number (114444375).

Almost surely, 2^228888749 is an apocalyptic number.

It is an amenable number.

228888749 is a deficient number, since it is larger than the sum of its proper divisors (1).

228888749 is an equidigital number, since it uses as much as digits as its factorization.

228888749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4128768, while the sum is 56.

The square root of 228888749 is about 15129.0696673655. The cubic root of 228888749 is about 611.7042273715.

The spelling of 228888749 in words is "two hundred twenty-eight million, eight hundred eighty-eight thousand, seven hundred forty-nine".