228673728 has 168 divisors, whose sum is σ = 702295776. Its totient is φ = 70963200.

The previous prime is 228673723. The next prime is 228673733. The reversal of 228673728 is 827376822.

It is an interprime number because it is at equal distance from previous prime (228673723) and next prime (228673733).

It is not an unprimeable number, because it can be changed into a prime (228673723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 542958 + ... + 543378.

It is an arithmetic number, because the mean of its divisors is an integer number (4180332).

Almost surely, 2^228673728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228673728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351147888).

228673728 is an abundant number, since it is smaller than the sum of its proper divisors (473622048).

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

228673728 is a wasteful number, since it uses less digits than its factorization.

228673728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503 (or 490 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 228673728 is about 15121.9617774943. The cubic root of 228673728 is about 611.5126197841.

The spelling of 228673728 in words is "two hundred twenty-eight million, six hundred seventy-three thousand, seven hundred twenty-eight".