228868457 has 2 divisors, whose sum is σ = 228868458. Its totient is φ = 228868456.

The previous prime is 228868439. The next prime is 228868459. The reversal of 228868457 is 754868822.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145347136 + 83521321 = 12056^2 + 9139^2 .

It is a cyclic number.

It is not a de Polignac number, because 228868457 - 2⁸ = 228868201 is a prime.

Together with 228868459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (228868459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114434228 + 114434229.

It is an arithmetic number, because the mean of its divisors is an integer number (114434229).

Almost surely, 2^228868457 is an apocalyptic number.

It is an amenable number.

228868457 is a deficient number, since it is larger than the sum of its proper divisors (1).

228868457 is an equidigital number, since it uses as much as digits as its factorization.

228868457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1720320, while the sum is 50.

The square root of 228868457 is about 15128.3990230295. The cubic root of 228868457 is about 611.6861500755.

The spelling of 228868457 in words is "two hundred twenty-eight million, eight hundred sixty-eight thousand, four hundred fifty-seven".