228143820 has 48 divisors (see below), whose sum is σ = 639646560. Its totient is φ = 60758016.

The previous prime is 228143819. The next prime is 228143827. The reversal of 228143820 is 28341822.

228143820 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (228143827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53694 + ... + 57786.

It is an arithmetic number, because the mean of its divisors is an integer number (13325970).

Almost surely, 2^228143820 is an apocalyptic number.

228143820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

228143820 is an abundant number, since it is smaller than the sum of its proper divisors (411502740).

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

228143820 is a wasteful number, since it uses less digits than its factorization.

228143820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034 (or 5032 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 30.

The square root of 228143820 is about 15104.4304758571. The cubic root of 228143820 is about 611.0398996055.

The spelling of 228143820 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred twenty".