228447787 has 2 divisors, whose sum is σ = 228447788. Its totient is φ = 228447786.

The previous prime is 228447757. The next prime is 228447803. The reversal of 228447787 is 787744822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228447787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228447787.

It is not a weakly prime, because it can be changed into another prime (228447757) 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 as a sum of consecutive naturals, namely, 114223893 + 114223894.

It is an arithmetic number, because the mean of its divisors is an integer number (114223894).

Almost surely, 2^228447787 is an apocalyptic number.

228447787 is a deficient number, since it is larger than the sum of its proper divisors (1).

228447787 is an equidigital number, since it uses as much as digits as its factorization.

228447787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1404928, while the sum is 49.

The square root of 228447787 is about 15114.4893066223. The cubic root of 228447787 is about 611.3111518034.

The spelling of 228447787 in words is "two hundred twenty-eight million, four hundred forty-seven thousand, seven hundred eighty-seven".