228728341 has 2 divisors, whose sum is σ = 228728342. Its totient is φ = 228728340.

The previous prime is 228728333. The next prime is 228728351. The reversal of 228728341 is 143827822.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159921316 + 68807025 = 12646^2 + 8295^2 .

It is a cyclic number.

It is not a de Polignac number, because 228728341 - 2³ = 228728333 is a prime.

It is a super-2 number, since 2×228728341² = 104633307953224562, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 228728341.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228728351) 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, 114364170 + 114364171.

It is an arithmetic number, because the mean of its divisors is an integer number (114364171).

Almost surely, 2^228728341 is an apocalyptic number.

It is an amenable number.

228728341 is a deficient number, since it is larger than the sum of its proper divisors (1).

228728341 is an equidigital number, since it uses as much as digits as its factorization.

228728341 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 37.

The square root of 228728341 is about 15123.7674208512. The cubic root of 228728341 is about 611.5612974069.

It can be divided in two parts, 22872 and 8341, that added together give a palindrome (31213).

The spelling of 228728341 in words is "two hundred twenty-eight million, seven hundred twenty-eight thousand, three hundred forty-one".