228209100 has 144 divisors (see below), whose sum is σ = 759284736. Its totient is φ = 51840000.

The previous prime is 228209063. The next prime is 228209101. The reversal of 228209100 is 1902822.

228209100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (228209101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 568900 + ... + 569300.

Almost surely, 2^228209100 is an apocalyptic number.

228209100 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 228209100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379642368).

228209100 is an abundant number, since it is smaller than the sum of its proper divisors (531075636).

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

228209100 is a wasteful number, since it uses less digits than its factorization.

228209100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 228209100 is about 15106.5912766580. The cubic root of 228209100 is about 611.0981740757.

The spelling of 228209100 in words is "two hundred twenty-eight million, two hundred nine thousand, one hundred".