228108720 has 320 divisors, whose sum is σ = 878515200. Its totient is φ = 48771072.

The previous prime is 228108709. The next prime is 228108731. The reversal of 228108720 is 27801822.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (228108709) and next prime (228108731).

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

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1399359 + ... + 1399521.

It is an arithmetic number, because the mean of its divisors is an integer number (2745360).

Almost surely, 2^228108720 is an apocalyptic number.

228108720 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 228108720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439257600).

228108720 is an abundant number, since it is smaller than the sum of its proper divisors (650406480).

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

228108720 is a wasteful number, since it uses less digits than its factorization.

228108720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 197 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 228108720 is about 15103.2685204230. The cubic root of 228108720 is about 611.0085617700.

The spelling of 228108720 in words is "two hundred twenty-eight million, one hundred eight thousand, seven hundred twenty".