228667813 has 8 divisors (see below), whose sum is σ = 258058080. Its totient is φ = 200711280.

The previous prime is 228667801. The next prime is 228667819. The reversal of 228667813 is 318766822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 228667813 - 2¹⁷ = 228536741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 228667813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228667819) 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 in 7 ways as a sum of consecutive naturals, for example, 358095 + ... + 358732.

It is an arithmetic number, because the mean of its divisors is an integer number (32257260).

Almost surely, 2^228667813 is an apocalyptic number.

It is an amenable number.

228667813 is a deficient number, since it is larger than the sum of its proper divisors (29390267).

228667813 is a wasteful number, since it uses less digits than its factorization.

228667813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716867.

The product of its digits is 193536, while the sum is 43.

The square root of 228667813 is about 15121.7661997533. The cubic root of 228667813 is about 611.5073471651.

Subtracting 228667813 from its reverse (318766822), we obtain a palindrome (90099009).

The spelling of 228667813 in words is "two hundred twenty-eight million, six hundred sixty-seven thousand, eight hundred thirteen".