228144840 has 128 divisors (see below), whose sum is σ = 853355520. Its totient is φ = 47404800.

The previous prime is 228144823. The next prime is 228144857. The reversal of 228144840 is 48441822.

228144840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (228144823) and next prime (228144857).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3106 + ... + 21585.

It is an arithmetic number, because the mean of its divisors is an integer number (6666840).

Almost surely, 2^228144840 is an apocalyptic number.

228144840 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 228144840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (426677760).

228144840 is an abundant number, since it is smaller than the sum of its proper divisors (625210680).

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

228144840 is a wasteful number, since it uses less digits than its factorization.

228144840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24723 (or 24719 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 33.

The square root of 228144840 is about 15104.4642407468. The cubic root of 228144840 is about 611.0408102295.

The spelling of 228144840 in words is "two hundred twenty-eight million, one hundred forty-four thousand, eight hundred forty".