228385485 has 12 divisors (see below), whose sum is σ = 395868252. Its totient is φ = 121805568.

The previous prime is 228385483. The next prime is 228385489. The reversal of 228385485 is 584583822.

228385485 is a `hidden beast` number, since 22 + 83 + 8 + 548 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 26347689 + 202037796 = 5133^2 + 14214^2 .

It is not a de Polignac number, because 228385485 - 2¹ = 228385483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 5075233 = 228385485 / (2 + 2 + 8 + 3 + 8 + 5 + 4 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 228385485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228385483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2537572 + ... + 2537661.

It is an arithmetic number, because the mean of its divisors is an integer number (32989021).

Almost surely, 2^228385485 is an apocalyptic number.

It is an amenable number.

228385485 is a deficient number, since it is larger than the sum of its proper divisors (167482767).

228385485 is a wasteful number, since it uses less digits than its factorization.

228385485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075244 (or 5075241 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 228385485 is about 15112.4281636010. The cubic root of 228385485 is about 611.2555747418.

The spelling of 228385485 in words is "two hundred twenty-eight million, three hundred eighty-five thousand, four hundred eighty-five".