228833989 has 2 divisors, whose sum is σ = 228833990. Its totient is φ = 228833988.

The previous prime is 228833963. The next prime is 228833999. The reversal of 228833989 is 989338822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142993764 + 85840225 = 11958^2 + 9265^2 .

It is a cyclic number.

It is not a de Polignac number, because 228833989 - 2⁷ = 228833861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228833999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114416994 + 114416995.

It is an arithmetic number, because the mean of its divisors is an integer number (114416995).

Almost surely, 2^228833989 is an apocalyptic number.

It is an amenable number.

228833989 is a deficient number, since it is larger than the sum of its proper divisors (1).

228833989 is an equidigital number, since it uses as much as digits as its factorization.

228833989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 52.

The square root of 228833989 is about 15127.2597981260. The cubic root of 228833989 is about 611.6554415235.

The spelling of 228833989 in words is "two hundred twenty-eight million, eight hundred thirty-three thousand, nine hundred eighty-nine".