228328535 has 4 divisors (see below), whose sum is σ = 273994248. Its totient is φ = 182662824.

The previous prime is 228328531. The next prime is 228328537. The reversal of 228328535 is 535823822.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 535823822 = 2 ⋅267911911.

It is a cyclic number.

It is not a de Polignac number, because 228328535 - 2² = 228328531 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 (228328531) 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 3 ways as a sum of consecutive naturals, for example, 22832849 + ... + 22832858.

It is an arithmetic number, because the mean of its divisors is an integer number (68498562).

Almost surely, 2^228328535 is an apocalyptic number.

228328535 is a deficient number, since it is larger than the sum of its proper divisors (45665713).

228328535 is an equidigital number, since it uses as much as digits as its factorization.

228328535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45665712.

The product of its digits is 115200, while the sum is 38.

The square root of 228328535 is about 15110.5438353489. The cubic root of 228328535 is about 611.2047631373.

It can be divided in two parts, 2283 and 28535, that multiplied together give a triangular number (65145405 = T₁₁₄₁₄).

The spelling of 228328535 in words is "two hundred twenty-eight million, three hundred twenty-eight thousand, five hundred thirty-five".