228138260 has 24 divisors (see below), whose sum is σ = 547532160. Its totient is φ = 78218784.

The previous prime is 228138241. The next prime is 228138271. The reversal of 228138260 is 62831822.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 814640 + ... + 814919.

It is an arithmetic number, because the mean of its divisors is an integer number (22813840).

Almost surely, 2^228138260 is an apocalyptic number.

228138260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228138260 is an abundant number, since it is smaller than the sum of its proper divisors (319393900).

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

228138260 is a wasteful number, since it uses less digits than its factorization.

228138260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1629575 (or 1629573 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 228138260 is about 15104.2464227779. The cubic root of 228138260 is about 611.0349357637.

The spelling of 228138260 in words is "two hundred twenty-eight million, one hundred thirty-eight thousand, two hundred sixty".