228478 has 8 divisors (see below), whose sum is σ = 347760. Its totient is φ = 112560.

The previous prime is 228469. The next prime is 228479. The reversal of 228478 is 874822.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228479) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 663 + ... + 946.

It is an arithmetic number, because the mean of its divisors is an integer number (43470).

228478 is a Friedman number, since it can be written as 478^2-8+2, using all its digits and the basic arithmetic operations.

2²²⁸⁴⁷⁸ is an apocalyptic number.

228478 is a deficient number, since it is larger than the sum of its proper divisors (119282).

228478 is a wasteful number, since it uses less digits than its factorization.

228478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682.

The product of its digits is 7168, while the sum is 31.

The square root of 228478 is about 477.9937238082. The cubic root of 228478 is about 61.1338099945.

The spelling of 228478 in words is "two hundred twenty-eight thousand, four hundred seventy-eight".