228143380 has 48 divisors (see below), whose sum is σ = 492395904. Its totient is φ = 88744320.

The previous prime is 228143347. The next prime is 228143381. The reversal of 228143380 is 83341822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228143381) 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, 267034 + ... + 267886.

It is an arithmetic number, because the mean of its divisors is an integer number (10258248).

Almost surely, 2^228143380 is an apocalyptic number.

228143380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228143380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246197952).

228143380 is an abundant number, since it is smaller than the sum of its proper divisors (264252524).

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

228143380 is a wasteful number, since it uses less digits than its factorization.

228143380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216 (or 1214 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 228143380 is about 15104.4159105872. The cubic root of 228143380 is about 611.0395067864.

The spelling of 228143380 in words is "two hundred twenty-eight million, one hundred forty-three thousand, three hundred eighty".