228144720 has 80 divisors (see below), whose sum is σ = 708829632. Its totient is φ = 60702720.

The previous prime is 228144703. The next prime is 228144727. The reversal of 228144720 is 27441822.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228144727) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 153099 + ... + 154581.

Almost surely, 2^228144720 is an apocalyptic number.

228144720 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 228144720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354414816).

228144720 is an abundant number, since it is smaller than the sum of its proper divisors (480684912).

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

228144720 is a wasteful number, since it uses less digits than its factorization.

228144720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140 (or 2134 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 228144720 is about 15104.4602684108. The cubic root of 228144720 is about 611.0407030974.

The spelling of 228144720 in words is "two hundred twenty-eight million, one hundred forty-four thousand, seven hundred twenty".