228268520 has 32 divisors (see below), whose sum is σ = 543817800. Its totient is φ = 85936128.

The previous prime is 228268517. The next prime is 228268529. The reversal of 228268520 is 25862822.

It can be written as a sum of positive squares in 4 ways, for example, as 174187204 + 54081316 = 13198^2 + 7354^2 .

It is not an unprimeable number, because it can be changed into a prime (228268529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167165 + ... + 168524.

Almost surely, 2^228268520 is an apocalyptic number.

228268520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228268520 is an abundant number, since it is smaller than the sum of its proper divisors (315549280).

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

228268520 is a wasteful number, since it uses less digits than its factorization.

228268520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335717 (or 335713 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 35.

The square root of 228268520 is about 15108.5578398469. The cubic root of 228268520 is about 611.1512077517.

The spelling of 228268520 in words is "two hundred twenty-eight million, two hundred sixty-eight thousand, five hundred twenty".