228181284 has 36 divisors (see below), whose sum is σ = 577618860. Its totient is φ = 75951360.

The previous prime is 228181253. The next prime is 228181333. The reversal of 228181284 is 482181822.

It can be written as a sum of positive squares in 2 ways, for example, as 9437184 + 218744100 = 3072^2 + 14790^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 23232 + ... + 31560.

Almost surely, 2^228181284 is an apocalyptic number.

It is an amenable number.

228181284 is an abundant number, since it is smaller than the sum of its proper divisors (349437576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228181284 is a wasteful number, since it uses less digits than its factorization.

228181284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9100 (or 9095 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 228181284 is about 15105.6705908741. The cubic root of 228181284 is about 611.0733445115.

The spelling of 228181284 in words is "two hundred twenty-eight million, one hundred eighty-one thousand, two hundred eighty-four".