228366520 has 16 divisors (see below), whose sum is σ = 513824760. Its totient is φ = 91346592.

The previous prime is 228366497. The next prime is 228366581. The reversal of 228366520 is 25663822.

228366520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854542 + ... + 2854621.

Almost surely, 2^228366520 is an apocalyptic number.

228366520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228366520 is an abundant number, since it is smaller than the sum of its proper divisors (285458240).

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

228366520 is a wasteful number, since it uses less digits than its factorization.

228366520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5709174 (or 5709170 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 228366520 is about 15111.8006868804. The cubic root of 228366520 is about 611.2386548358.

The spelling of 228366520 in words is "two hundred twenty-eight million, three hundred sixty-six thousand, five hundred twenty".