228784863 has 4 divisors (see below), whose sum is σ = 305046488. Its totient is φ = 152523240.

The previous prime is 228784859. The next prime is 228784873. The reversal of 228784863 is 368487822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 228784863 - 2² = 228784859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228784873) 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 3 ways as a sum of consecutive naturals, for example, 38130808 + ... + 38130813.

It is an arithmetic number, because the mean of its divisors is an integer number (76261622).

Almost surely, 2^228784863 is an apocalyptic number.

228784863 is a deficient number, since it is larger than the sum of its proper divisors (76261625).

228784863 is an equidigital number, since it uses as much as digits as its factorization.

228784863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76261624.

The product of its digits is 1032192, while the sum is 48.

The square root of 228784863 is about 15125.6359535723. The cubic root of 228784863 is about 611.6116683996.

The spelling of 228784863 in words is "two hundred twenty-eight million, seven hundred eighty-four thousand, eight hundred sixty-three".