228445 has 16 divisors (see below), whose sum is σ = 321408. Its totient is φ = 152640.

The previous prime is 228443. The next prime is 228451. The reversal of 228445 is 544822.

It is a happy number.

It is not a de Polignac number, because 228445 - 2¹ = 228443 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 (228443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2082 + ... + 2188.

It is an arithmetic number, because the mean of its divisors is an integer number (20088).

2²²⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

228445 is a deficient number, since it is larger than the sum of its proper divisors (92963).

228445 is a wasteful number, since it uses less digits than its factorization.

228445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its digits is 2560, while the sum is 25.

The square root of 228445 is about 477.9592032799. The cubic root of 228445 is about 61.1308665851.

The spelling of 228445 in words is "two hundred twenty-eight thousand, four hundred forty-five".