228328985 has 8 divisors (see below), whose sum is σ = 288415680. Its totient is φ = 173049264.

The previous prime is 228328967. The next prime is 228329009. The reversal of 228328985 is 589823822.

It is a happy number.

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

It is not a de Polignac number, because 228328985 - 2¹⁰ = 228327961 is a prime.

It is a super-2 number, since 2×228328985² = 104268250782260450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1201637 + ... + 1201826.

It is an arithmetic number, because the mean of its divisors is an integer number (36051960).

Almost surely, 2^228328985 is an apocalyptic number.

It is an amenable number.

228328985 is a deficient number, since it is larger than the sum of its proper divisors (60086695).

228328985 is a wasteful number, since it uses less digits than its factorization.

228328985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403487.

The product of its digits is 552960, while the sum is 47.

The square root of 228328985 is about 15110.5587256064. The cubic root of 228328985 is about 611.2051646668.

The spelling of 228328985 in words is "two hundred twenty-eight million, three hundred twenty-eight thousand, nine hundred eighty-five".