228387812 has 12 divisors (see below), whose sum is σ = 407220156. Its totient is φ = 112039200.

The previous prime is 228387811. The next prime is 228387821. The reversal of 228387812 is 218783822.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 76457536 + 151930276 = 8744^2 + 12326^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 228387812.

It is not an unprimeable number, because it can be changed into a prime (228387811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538439 + ... + 538862.

It is an arithmetic number, because the mean of its divisors is an integer number (33935013).

Almost surely, 2^228387812 is an apocalyptic number.

It is an amenable number.

228387812 is a deficient number, since it is larger than the sum of its proper divisors (178832344).

228387812 is a wasteful number, since it uses less digits than its factorization.

228387812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077358 (or 1077356 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 228387812 is about 15112.5051530181. The cubic root of 228387812 is about 611.2576507449.

The spelling of 228387812 in words is "two hundred twenty-eight million, three hundred eighty-seven thousand, eight hundred twelve".