228778 has 8 divisors (see below), whose sum is σ = 374400. Its totient is φ = 103980.

The previous prime is 228773. The next prime is 228793. The reversal of 228778 is 877822.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (228773) by changing a digit.

228778 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5178 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (46800).

2²²⁸⁷⁷⁸ is an apocalyptic number.

228778 is a deficient number, since it is larger than the sum of its proper divisors (145622).

228778 is a wasteful number, since it uses less digits than its factorization.

228778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10412.

The product of its digits is 12544, while the sum is 34.

The square root of 228778 is about 478.3074325159. The cubic root of 228778 is about 61.1605552708.

The spelling of 228778 in words is "two hundred twenty-eight thousand, seven hundred seventy-eight".