228144740 has 72 divisors (see below), whose sum is σ = 508629240. Its totient is φ = 85851136.

The previous prime is 228144727. The next prime is 228144767. The reversal of 228144740 is 47441822.

228144740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13924 + 228130816 = 118^2 + 15104^2 .

It is a junction number, because it is equal to n+sod(n) for n = 228144697 and 228144706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2018924 + ... + 2019036.

It is an arithmetic number, because the mean of its divisors is an integer number (7064295).

Almost surely, 2^228144740 is an apocalyptic number.

228144740 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 228144740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254314620).

228144740 is an abundant number, since it is smaller than the sum of its proper divisors (280484500).

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

228144740 is a wasteful number, since it uses less digits than its factorization.

228144740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 32.

The square root of 228144740 is about 15104.4609304669. The cubic root of 228144740 is about 611.0407209528.

The spelling of 228144740 in words is "two hundred twenty-eight million, one hundred forty-four thousand, seven hundred forty".