228304720 has 120 divisors (see below), whose sum is σ = 623397600. Its totient is φ = 77527296.

The previous prime is 228304717. The next prime is 228304787. The reversal of 228304720 is 27403822.

228304720 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 544671 + ... + 545089.

It is an arithmetic number, because the mean of its divisors is an integer number (5194980).

Almost surely, 2^228304720 is an apocalyptic number.

228304720 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 228304720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311698800).

228304720 is an abundant number, since it is smaller than the sum of its proper divisors (395092880).

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

228304720 is a wasteful number, since it uses less digits than its factorization.

228304720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 572 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 228304720 is about 15109.7557888935. The cubic root of 228304720 is about 611.1835125483.

The spelling of 228304720 in words is "two hundred twenty-eight million, three hundred four thousand, seven hundred twenty".