228170749 has 4 divisors (see below), whose sum is σ = 234337564. Its totient is φ = 222003936.

The previous prime is 228170743. The next prime is 228170773. The reversal of 228170749 is 947071822.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209525625 + 18645124 = 14475^2 + 4318^2 .

It is a cyclic number.

It is not a de Polignac number, because 228170749 - 2¹⁷ = 228039677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228170743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3083352 + ... + 3083425.

It is an arithmetic number, because the mean of its divisors is an integer number (58584391).

Almost surely, 2^228170749 is an apocalyptic number.

It is an amenable number.

228170749 is a deficient number, since it is larger than the sum of its proper divisors (6166815).

228170749 is an equidigital number, since it uses as much as digits as its factorization.

228170749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6166814.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 228170749 is about 15105.3218767426. The cubic root of 228170749 is about 611.0639400639.

The spelling of 228170749 in words is "two hundred twenty-eight million, one hundred seventy thousand, seven hundred forty-nine".