228209826 has 48 divisors (see below), whose sum is σ = 501162336. Its totient is φ = 69234048.

The previous prime is 228209809. The next prime is 228209827. The reversal of 228209826 is 628902822.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (228209827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72481 + ... + 75563.

It is an arithmetic number, because the mean of its divisors is an integer number (10440882).

Almost surely, 2^228209826 is an apocalyptic number.

228209826 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 228209826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250581168).

228209826 is an abundant number, since it is smaller than the sum of its proper divisors (272952510).

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

228209826 is a wasteful number, since it uses less digits than its factorization.

228209826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3187 (or 3174 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 228209826 is about 15106.6153058850. The cubic root of 228209826 is about 611.0988221024.

The spelling of 228209826 in words is "two hundred twenty-eight million, two hundred nine thousand, eight hundred twenty-six".