225428 has 24 divisors (see below), whose sum is σ = 460992. Its totient is φ = 94464.

The previous prime is 225427. The next prime is 225431. The reversal of 225428 is 824522.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225428.

It is not an unprimeable number, because it can be changed into a prime (225427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2276 + ... + 2372.

It is an arithmetic number, because the mean of its divisors is an integer number (19208).

2²²⁵⁴²⁸ is an apocalyptic number.

225428 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

225428 is an abundant number, since it is smaller than the sum of its proper divisors (235564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225428 is a wasteful number, since it uses less digits than its factorization.

225428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

The product of its digits is 1280, while the sum is 23.

The square root of 225428 is about 474.7925862943. The cubic root of 225428 is about 60.8605611940.

The spelling of 225428 in words is "two hundred twenty-five thousand, four hundred twenty-eight".