228387815 has 24 divisors (see below), whose sum is σ = 290391360. Its totient is φ = 172396224.

The previous prime is 228387811. The next prime is 228387821. The reversal of 228387815 is 518783822.

It is not a de Polignac number, because 228387815 - 2² = 228387811 is a prime.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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 (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 208409 + ... + 209501.

It is an arithmetic number, because the mean of its divisors is an integer number (12099640).

Almost surely, 2^228387815 is an apocalyptic number.

228387815 is a deficient number, since it is larger than the sum of its proper divisors (62003545).

228387815 is a wasteful number, since it uses less digits than its factorization.

228387815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1200 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 228387815 is about 15112.5052522737. The cubic root of 228387815 is about 611.2576534213.

The spelling of 228387815 in words is "two hundred twenty-eight million, three hundred eighty-seven thousand, eight hundred fifteen".