228143844 has 96 divisors (see below), whose sum is σ = 615753600. Its totient is φ = 72990720.

The previous prime is 228143833. The next prime is 228143857. The reversal of 228143844 is 448341822.

228143844 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×228143844² = 104099227110192672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 228143799 and 228143808.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 296292 + ... + 297060.

It is an arithmetic number, because the mean of its divisors is an integer number (6414100).

Almost surely, 2^228143844 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 228143844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (307876800).

228143844 is an abundant number, since it is smaller than the sum of its proper divisors (387609756).

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

228143844 is a wasteful number, since it uses less digits than its factorization.

228143844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 890 (or 882 counting only the distinct ones).

The product of its digits is 49152, while the sum is 36.

The square root of 228143844 is about 15104.4312703259. The cubic root of 228143844 is about 611.0399210319.

The spelling of 228143844 in words is "two hundred twenty-eight million, one hundred forty-three thousand, eight hundred forty-four".