228339720 has 288 divisors, whose sum is σ = 898672320. Its totient is φ = 49248000.

The previous prime is 228339697. The next prime is 228339731. The reversal of 228339720 is 27933822.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 909595 + ... + 909845.

It is an arithmetic number, because the mean of its divisors is an integer number (3120390).

Almost surely, 2^228339720 is an apocalyptic number.

228339720 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 228339720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449336160).

228339720 is an abundant number, since it is smaller than the sum of its proper divisors (670332600).

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

228339720 is a wasteful number, since it uses less digits than its factorization.

228339720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 228339720 is about 15110.9139366221. The cubic root of 228339720 is about 611.2147432209.

The spelling of 228339720 in words is "two hundred twenty-eight million, three hundred thirty-nine thousand, seven hundred twenty".