228107520 has 108 divisors (see below), whose sum is σ = 789268116. Its totient is φ = 60825600.

The previous prime is 228107519. The next prime is 228107543. The reversal of 228107520 is 25701822.

It can be written as a sum of positive squares in 2 ways, for example, as 23503104 + 204604416 = 4848^2 + 14304^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1620 + ... + 21420.

Almost surely, 2^228107520 is an apocalyptic number.

228107520 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 228107520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (394634058).

228107520 is an abundant number, since it is smaller than the sum of its proper divisors (561160596).

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

228107520 is a wasteful number, since it uses less digits than its factorization.

228107520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19828 (or 19811 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 228107520 is about 15103.2287938705. The cubic root of 228107520 is about 611.0074903342.

The spelling of 228107520 in words is "two hundred twenty-eight million, one hundred seven thousand, five hundred twenty".